diff --git a/src/boxes/intent_box.rs b/src/boxes/intent_box.rs
new file mode 100644
index 00000000..3712d528
--- /dev/null
+++ b/src/boxes/intent_box.rs
@@ -0,0 +1,210 @@
+/*! 🌐 IntentBox - 通信世界を定義するBox
+ * 
+ * ## 📝 概要
+ * IntentBoxは「通信世界」を定義する中心的なコンポーネントです。
+ * P2PBoxノードが参加する通信環境を抽象化し、
+ * プロセス内通信、WebSocket、共有メモリなど
+ * 様々な通信方式を統一的に扱います。
+ * 
+ * ## 🛠️ 利用可能メソッド
+ * - `new()` - デフォルト（ローカル）通信世界を作成
+ * - `new_with_transport(transport)` - カスタム通信方式で作成
+ * - `register_node(node)` - P2PBoxノードを登録
+ * - `unregister_node(node_id)` - ノードを登録解除
+ * - `get_transport()` - 通信トランスポートを取得
+ * 
+ * ## 💡 使用例
+ * ```nyash
+ * // ローカル通信世界
+ * local_world = new IntentBox()
+ * 
+ * // WebSocket通信世界（将来）
+ * remote_world = new IntentBox(websocket, {
+ *     "url": "ws://example.com/api"
+ * })
+ * ```
+ */
+
+use crate::box_trait::{NyashBox, StringBox, BoolBox};
+use std::any::Any;
+use std::sync::{Arc, Mutex};
+use std::fmt::{self, Debug};
+
+/// 通信方式を抽象化するトレイト
+pub trait Transport: Send + Sync {
+    /// 特定のノードにメッセージを送信
+    fn send(&self, from: &str, to: &str, intent: &str, data: Box<dyn NyashBox>);
+    
+    /// 全ノードにメッセージをブロードキャスト
+    fn broadcast(&self, from: &str, intent: &str, data: Box<dyn NyashBox>);
+    
+    /// トランスポートの種類を取得
+    fn transport_type(&self) -> &str;
+}
+
+/// ローカル（プロセス内）通信を実装
+pub struct LocalTransport {
+    /// メッセージキュー
+    message_queue: Arc<Mutex<Vec<Message>>>,
+}
+
+/// メッセージ構造体
+pub struct Message {
+    pub from: String,
+    pub to: Option<String>,  // Noneの場合はブロードキャスト
+    pub intent: String,
+    pub data: Box<dyn NyashBox>,
+}
+
+impl Clone for Message {
+    fn clone(&self) -> Self {
+        Message {
+            from: self.from.clone(),
+            to: self.to.clone(),
+            intent: self.intent.clone(),
+            data: self.data.clone_box(),
+        }
+    }
+}
+
+impl LocalTransport {
+    pub fn new() -> Self {
+        LocalTransport {
+            message_queue: Arc::new(Mutex::new(Vec::new())),
+        }
+    }
+    
+    /// メッセージをキューに追加
+    pub fn enqueue_message(&self, msg: Message) {
+        let mut queue = self.message_queue.lock().unwrap();
+        queue.push(msg);
+    }
+    
+    /// キューからメッセージを取得
+    pub fn dequeue_messages(&self) -> Vec<Message> {
+        let mut queue = self.message_queue.lock().unwrap();
+        let messages = queue.drain(..).collect();
+        messages
+    }
+}
+
+impl Transport for LocalTransport {
+    fn send(&self, from: &str, to: &str, intent: &str, data: Box<dyn NyashBox>) {
+        let msg = Message {
+            from: from.to_string(),
+            to: Some(to.to_string()),
+            intent: intent.to_string(),
+            data,
+        };
+        
+        // メッセージをキューに追加
+        self.enqueue_message(msg);
+    }
+    
+    fn broadcast(&self, from: &str, intent: &str, data: Box<dyn NyashBox>) {
+        let msg = Message {
+            from: from.to_string(),
+            to: None,
+            intent: intent.to_string(),
+            data,
+        };
+        
+        // メッセージをキューに追加
+        self.enqueue_message(msg);
+    }
+    
+    fn transport_type(&self) -> &str {
+        "local"
+    }
+}
+
+/// IntentBox - 通信世界を定義
+#[derive(Clone)]
+pub struct IntentBox {
+    id: u64,
+    transport: Arc<Mutex<Box<dyn Transport>>>,
+}
+
+impl Debug for IntentBox {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("IntentBox")
+            .field("id", &self.id)
+            .field("transport", &"<Transport>")
+            .finish()
+    }
+}
+
+impl IntentBox {
+    /// デフォルト（ローカル）通信世界を作成
+    pub fn new() -> Self {
+        static mut COUNTER: u64 = 0;
+        let id = unsafe {
+            COUNTER += 1;
+            COUNTER
+        };
+        
+        IntentBox {
+            id,
+            transport: Arc::new(Mutex::new(Box::new(LocalTransport::new()))),
+        }
+    }
+    
+    /// カスタムトランスポートで通信世界を作成
+    pub fn new_with_transport(transport: Box<dyn Transport>) -> Self {
+        static mut COUNTER: u64 = 0;
+        let id = unsafe {
+            COUNTER += 1;
+            COUNTER
+        };
+        
+        IntentBox {
+            id,
+            transport: Arc::new(Mutex::new(transport)),
+        }
+    }
+    
+    /// メッセージを処理（LocalTransport専用）
+    pub fn process_messages(&self) -> Vec<Message> {
+        let _transport = self.transport.lock().unwrap();
+        // TransportをAnyにキャストしてLocalTransportかチェック
+        // 現在はLocalTransportのみサポート
+        Vec::new()  // TODO: 実装
+    }
+    
+    /// トランスポートへのアクセス（P2PBoxから使用）
+    pub fn get_transport(&self) -> Arc<Mutex<Box<dyn Transport>>> {
+        self.transport.clone()
+    }
+}
+
+impl NyashBox for IntentBox {
+    fn to_string_box(&self) -> StringBox {
+        let transport = self.transport.lock().unwrap();
+        StringBox::new(format!("IntentBox[{}]", transport.transport_type()))
+    }
+    
+    fn equals(&self, other: &dyn NyashBox) -> BoolBox {
+        if let Some(other_intent) = other.as_any().downcast_ref::<IntentBox>() {
+            BoolBox::new(self.id == other_intent.id)
+        } else {
+            BoolBox::new(false)
+        }
+    }
+    
+    fn type_name(&self) -> &'static str {
+        "IntentBox"
+    }
+    
+    fn clone_box(&self) -> Box<dyn NyashBox> {
+        Box::new(self.clone())
+    }
+    
+    fn as_any(&self) -> &dyn Any {
+        self
+    }
+    
+    fn box_id(&self) -> u64 {
+        self.id
+    }
+}
+
diff --git a/src/boxes/mod.rs b/src/boxes/mod.rs
index 4b3acf9f..24ad41d1 100644
--- a/src/boxes/mod.rs
+++ b/src/boxes/mod.rs
@@ -106,9 +106,8 @@ pub mod stream;
 pub mod regex;
 
 // P2P通信Box群
-// pub mod intent_box;
-// pub mod intent_box_wrapper;
-// pub mod p2p_box;
+pub mod intent_box;
+pub mod p2p_box;
 
 // null関数も再エクスポート
 pub use null_box::{NullBox, null};
@@ -125,5 +124,5 @@ pub use stream::{NyashStreamBox, StreamBox};
 pub use regex::RegexBox;
 
 // P2P通信Boxの再エクスポート
-// pub use intent_box::IntentBox;
-// pub use p2p_box::P2PBox;
\ No newline at end of file
+pub use intent_box::IntentBox;
+pub use p2p_box::P2PBox;
\ No newline at end of file
diff --git a/src/boxes/p2p_box.rs b/src/boxes/p2p_box.rs
new file mode 100644
index 00000000..d2c40bef
--- /dev/null
+++ b/src/boxes/p2p_box.rs
@@ -0,0 +1,174 @@
+/*! 📡 P2PBox - 通信ノードBox
+ * 
+ * ## 📝 概要
+ * P2PBoxは通信世界（IntentBox）に参加するノードを表します。
+ * シンプルなsend/onインターフェースで、他のノードとメッセージを
+ * やり取りできます。Arc<Mutex>パターンにより、スレッドセーフな
+ * 並行通信を実現します。
+ * 
+ * ## 🛠️ 利用可能メソッド
+ * - `new(node_id, intent_box)` - ノードを作成して通信世界に参加
+ * - `send(intent, data, target)` - 特定ノードにメッセージ送信
+ * - `broadcast(intent, data)` - 全ノードにブロードキャスト
+ * - `on(intent, callback)` - イベントリスナー登録
+ * - `off(intent)` - リスナー解除
+ * - `get_node_id()` - ノードID取得
+ * 
+ * ## 💡 使用例
+ * ```nyash
+ * // 通信世界を作成
+ * world = new IntentBox()
+ * 
+ * // ノードを作成
+ * alice = new P2PBox("alice", world)
+ * bob = new P2PBox("bob", world)
+ * 
+ * // リスナー登録
+ * bob.on("greeting", |data, from| {
+ *     print(from + " says: " + data.get("text"))
+ * })
+ * 
+ * // メッセージ送信
+ * alice.send("greeting", { "text": "Hello Bob!" }, "bob")
+ * ```
+ */
+
+use crate::box_trait::{NyashBox, StringBox, BoolBox};
+use crate::boxes::intent_box::IntentBox;
+pub use crate::boxes::intent_box::Message;
+use crate::boxes::map_box::MapBox;
+use std::any::Any;
+use std::sync::{Arc, Mutex};
+use std::collections::HashMap;
+
+/// リスナー関数の型（MethodBoxまたはクロージャ）
+pub type ListenerFn = Box<dyn NyashBox>;
+
+/// P2PBox内部実装
+#[derive(Debug)]
+struct P2PBoxInner {
+    id: u64,
+    node_id: String,
+    intent_box: Arc<IntentBox>,
+    listeners: Arc<Mutex<HashMap<String, Vec<ListenerFn>>>>,
+}
+
+/// P2PBox - 通信ノード（Arc<P2PBoxInner>のラッパー）
+#[derive(Debug, Clone)]
+pub struct P2PBox {
+    inner: Arc<P2PBoxInner>,
+}
+
+impl P2PBox {
+    /// 新しいP2PBoxノードを作成
+    pub fn new(node_id: String, intent_box: Arc<IntentBox>) -> Self {
+        static mut COUNTER: u64 = 0;
+        let id = unsafe {
+            COUNTER += 1;
+            COUNTER
+        };
+        
+        let inner = Arc::new(P2PBoxInner {
+            id,
+            node_id,
+            intent_box: intent_box.clone(),
+            listeners: Arc::new(Mutex::new(HashMap::new())),
+        });
+        
+        P2PBox { inner }
+    }
+    
+    /// ノードIDを取得
+    pub fn get_node_id(&self) -> String {
+        self.inner.node_id.clone()
+    }
+    
+    /// 特定のノードにメッセージを送信
+    pub fn send(&self, intent: &str, data: Box<dyn NyashBox>, target: &str) -> Box<dyn NyashBox> {
+        let transport = self.inner.intent_box.get_transport();
+        let transport = transport.lock().unwrap();
+        transport.send(&self.inner.node_id, target, intent, data);
+        Box::new(StringBox::new("sent"))
+    }
+    
+    /// 全ノードにメッセージをブロードキャスト
+    pub fn broadcast(&self, intent: &str, data: Box<dyn NyashBox>) -> Box<dyn NyashBox> {
+        let transport = self.inner.intent_box.get_transport();
+        let transport = transport.lock().unwrap();
+        transport.broadcast(&self.inner.node_id, intent, data);
+        Box::new(StringBox::new("broadcast"))
+    }
+    
+    /// イベントリスナーを登録
+    pub fn on(&self, intent: &str, callback: Box<dyn NyashBox>) -> Box<dyn NyashBox> {
+        let mut listeners = self.inner.listeners.lock().unwrap();
+        listeners.entry(intent.to_string())
+            .or_insert_with(Vec::new)
+            .push(callback);
+        Box::new(StringBox::new("listener added"))
+    }
+    
+    /// リスナーを解除
+    pub fn off(&self, intent: &str) -> Box<dyn NyashBox> {
+        let mut listeners = self.inner.listeners.lock().unwrap();
+        if listeners.remove(intent).is_some() {
+            Box::new(StringBox::new("listener removed"))
+        } else {
+            Box::new(StringBox::new("no listener found"))
+        }
+    }
+    
+    /// メッセージを受信（IntentBoxから呼ばれる）
+    pub fn receive_message(&self, msg: Message) {
+        let listeners = self.inner.listeners.lock().unwrap();
+        
+        if let Some(callbacks) = listeners.get(&msg.intent) {
+            for _callback in callbacks {
+                // コールバック実行のための引数を準備
+                let args_map = MapBox::new();
+                args_map.set(Box::new(StringBox::new("data")), msg.data.clone_box());
+                args_map.set(Box::new(StringBox::new("from")), Box::new(StringBox::new(&msg.from)));
+                
+                // TODO: インタープリターコンテキストでコールバック実行
+                // 現在は単純化のため、メッセージ内容を出力
+                println!("P2PBox[{}] received '{}' from {}", self.inner.node_id, msg.intent, msg.from);
+            }
+        }
+    }
+}
+
+impl Drop for P2PBox {
+    fn drop(&mut self) {
+        // TODO: 破棄時にIntentBoxから登録解除
+    }
+}
+
+impl NyashBox for P2PBox {
+    fn to_string_box(&self) -> StringBox {
+        StringBox::new(format!("P2PBox[{}]", self.inner.node_id))
+    }
+    
+    fn equals(&self, other: &dyn NyashBox) -> BoolBox {
+        if let Some(other_p2p) = other.as_any().downcast_ref::<P2PBox>() {
+            BoolBox::new(self.inner.id == other_p2p.inner.id)
+        } else {
+            BoolBox::new(false)
+        }
+    }
+    
+    fn type_name(&self) -> &'static str {
+        "P2PBox"
+    }
+    
+    fn clone_box(&self) -> Box<dyn NyashBox> {
+        Box::new(self.clone())
+    }
+    
+    fn as_any(&self) -> &dyn Any {
+        self
+    }
+    
+    fn box_id(&self) -> u64 {
+        self.inner.id
+    }
+}
\ No newline at end of file
diff --git a/src/interpreter/expressions.rs b/src/interpreter/expressions.rs
index 0a32afa5..c4d0e038 100644
--- a/src/interpreter/expressions.rs
+++ b/src/interpreter/expressions.rs
@@ -8,7 +8,7 @@
 
 use super::*;
 use crate::ast::UnaryOperator;
-use crate::boxes::{buffer::BufferBox, JSONBox, HttpClientBox, StreamBox, RegexBox};
+use crate::boxes::{buffer::BufferBox, JSONBox, HttpClientBox, StreamBox, RegexBox, IntentBox, P2PBox};
 use crate::operator_traits::OperatorResolver;
 // TODO: Fix NullBox import issue later
 // use crate::NullBox;
@@ -427,6 +427,16 @@ impl NyashInterpreter {
             return self.execute_console_method(console_box, method, arguments);
         }
         
+        // IntentBox method calls
+        if let Some(intent_box) = obj_value.as_any().downcast_ref::<IntentBox>() {
+            return self.execute_intent_box_method(intent_box, method, arguments);
+        }
+        
+        // P2PBox method calls
+        if let Some(p2p_box) = obj_value.as_any().downcast_ref::<P2PBox>() {
+            return self.execute_p2p_box_method(p2p_box, method, arguments);
+        }
+        
         // EguiBox method calls (非WASM環境のみ)
         #[cfg(not(target_arch = "wasm32"))]
         if let Some(egui_box) = obj_value.as_any().downcast_ref::<crate::boxes::EguiBox>() {
diff --git a/src/interpreter/methods/mod.rs b/src/interpreter/methods/mod.rs
index 366b7988..df8b0008 100644
--- a/src/interpreter/methods/mod.rs
+++ b/src/interpreter/methods/mod.rs
@@ -21,6 +21,7 @@ pub mod collection_methods; // ArrayBox, MapBox
 pub mod io_methods;         // FileBox, ResultBox
 pub mod data_methods;       // BufferBox, JSONBox, RegexBox
 pub mod network_methods;    // HttpClientBox, StreamBox
+pub mod p2p_methods;        // IntentBox, P2PBox
 
 // Re-export methods for easy access
 pub use basic_methods::*;
diff --git a/src/interpreter/methods/p2p_methods.rs b/src/interpreter/methods/p2p_methods.rs
new file mode 100644
index 00000000..c56c9278
--- /dev/null
+++ b/src/interpreter/methods/p2p_methods.rs
@@ -0,0 +1,137 @@
+/*! 📡 P2P通信メソッド実装
+ * IntentBoxとP2PBoxのNyashインタープリター統合
+ */
+
+use crate::interpreter::core::NyashInterpreter;
+use crate::interpreter::core::RuntimeError;
+use crate::ast::ASTNode;
+use crate::box_trait::{NyashBox, StringBox};
+use crate::boxes::{IntentBox, P2PBox};
+
+impl NyashInterpreter {
+    /// IntentBoxのメソッド実行
+    pub(in crate::interpreter) fn execute_intent_box_method(
+        &mut self,
+        intent_box: &IntentBox,
+        method: &str,
+        _arguments: &[ASTNode],
+    ) -> Result<Box<dyn NyashBox>, RuntimeError> {
+        match method {
+            // 基本情報取得
+            "getType" | "type" => {
+                Ok(Box::new(StringBox::new("IntentBox")))
+            }
+            
+            // メッセージ処理（テスト用）
+            "processMessages" => {
+                let messages = intent_box.process_messages();
+                Ok(Box::new(StringBox::new(format!("Processed {} messages", messages.len()))))
+            }
+            
+            _ => Err(RuntimeError::UndefinedVariable {
+                name: format!("IntentBox method '{}' not found", method),
+            })
+        }
+    }
+    
+    /// P2PBoxのメソッド実行
+    pub(in crate::interpreter) fn execute_p2p_box_method(
+        &mut self,
+        p2p_box: &P2PBox,
+        method: &str,
+        arguments: &[ASTNode],
+    ) -> Result<Box<dyn NyashBox>, RuntimeError> {
+        match method {
+            // ノードID取得
+            "getNodeId" | "getId" => {
+                Ok(Box::new(StringBox::new(p2p_box.get_node_id())))
+            }
+            
+            // メッセージ送信
+            "send" => {
+                if arguments.len() < 3 {
+                    return Err(RuntimeError::InvalidOperation {
+                        message: "send requires 3 arguments: intent, data, target".to_string(),
+                    });
+                }
+                
+                let intent = self.execute_expression(&arguments[0])?;
+                let data = self.execute_expression(&arguments[1])?;
+                let target = self.execute_expression(&arguments[2])?;
+                
+                if let Some(intent_str) = intent.as_any().downcast_ref::<StringBox>() {
+                    if let Some(target_str) = target.as_any().downcast_ref::<StringBox>() {
+                        return Ok(p2p_box.send(&intent_str.value, data, &target_str.value));
+                    }
+                }
+                
+                Err(RuntimeError::TypeError {
+                    message: "send requires string arguments for intent and target".to_string(),
+                })
+            }
+            
+            // ブロードキャスト
+            "broadcast" => {
+                if arguments.len() < 2 {
+                    return Err(RuntimeError::InvalidOperation {
+                        message: "broadcast requires 2 arguments: intent, data".to_string(),
+                    });
+                }
+                
+                let intent = self.execute_expression(&arguments[0])?;
+                let data = self.execute_expression(&arguments[1])?;
+                
+                if let Some(intent_str) = intent.as_any().downcast_ref::<StringBox>() {
+                    return Ok(p2p_box.broadcast(&intent_str.value, data));
+                }
+                
+                Err(RuntimeError::TypeError {
+                    message: "broadcast requires string argument for intent".to_string(),
+                })
+            }
+            
+            // リスナー登録
+            "on" => {
+                if arguments.len() < 2 {
+                    return Err(RuntimeError::InvalidOperation {
+                        message: "on requires 2 arguments: intent, callback".to_string(),
+                    });
+                }
+                
+                let intent = self.execute_expression(&arguments[0])?;
+                let callback = self.execute_expression(&arguments[1])?;
+                
+                if let Some(intent_str) = intent.as_any().downcast_ref::<StringBox>() {
+                    return Ok(p2p_box.on(&intent_str.value, callback));
+                }
+                
+                Err(RuntimeError::TypeError {
+                    message: "on requires string argument for intent".to_string(),
+                })
+            }
+            
+            // リスナー解除
+            "off" => {
+                if arguments.is_empty() {
+                    return Err(RuntimeError::InvalidOperation {
+                        message: "off requires 1 argument: intent".to_string(),
+                    });
+                }
+                
+                let intent = self.execute_expression(&arguments[0])?;
+                
+                if let Some(intent_str) = intent.as_any().downcast_ref::<StringBox>() {
+                    return Ok(p2p_box.off(&intent_str.value));
+                }
+                
+                Err(RuntimeError::TypeError {
+                    message: "off requires string argument for intent".to_string(),
+                })
+            }
+            
+            _ => Err(RuntimeError::UndefinedVariable {
+                name: format!("P2PBox method '{}' not found", method),
+            })
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/interpreter/objects.rs b/src/interpreter/objects.rs
index bce8ba5f..e58b3586 100644
--- a/src/interpreter/objects.rs
+++ b/src/interpreter/objects.rs
@@ -442,6 +442,58 @@ impl NyashInterpreter {
                     });
                 }
             }
+            
+            "IntentBox" => {
+                // IntentBoxは引数なしで作成（デフォルトローカル通信）
+                if !arguments.is_empty() {
+                    return Err(RuntimeError::InvalidOperation {
+                        message: format!("IntentBox constructor expects 0 arguments, got {}", arguments.len()),
+                    });
+                }
+                let intent_box = crate::boxes::IntentBox::new();
+                return Ok(Box::new(intent_box) as Box<dyn NyashBox>);
+            }
+            
+            "P2PBox" => {
+                // P2PBoxは引数2個（node_id, intent_box）で作成
+                if arguments.is_empty() {
+                    return Err(RuntimeError::InvalidOperation {
+                        message: "P2PBox requires at least 1 argument (node_id)".to_string(),
+                    });
+                }
+                
+                // 引数を評価
+                let mut arg_values = Vec::new();
+                for arg in arguments {
+                    arg_values.push(self.execute_expression(arg)?);
+                }
+                
+                // 第1引数: ノードID
+                let node_id = if let Some(str_box) = arg_values[0].as_any().downcast_ref::<StringBox>() {
+                    str_box.value.clone()
+                } else {
+                    return Err(RuntimeError::TypeError {
+                        message: "P2PBox first argument must be a string (node_id)".to_string(),
+                    });
+                };
+                
+                // 第2引数: IntentBox（省略時はデフォルト）
+                let intent_box = if arg_values.len() > 1 {
+                    if let Some(intent) = arg_values[1].as_any().downcast_ref::<crate::boxes::IntentBox>() {
+                        std::sync::Arc::new(intent.clone())
+                    } else {
+                        return Err(RuntimeError::TypeError {
+                            message: "P2PBox second argument must be an IntentBox".to_string(),
+                        });
+                    }
+                } else {
+                    // デフォルトのIntentBoxを作成
+                    std::sync::Arc::new(crate::boxes::IntentBox::new())
+                };
+                
+                let p2p_box = crate::boxes::P2PBox::new(node_id, intent_box);
+                return Ok(Box::new(p2p_box));
+            }
             "StreamBox" => {
                 // StreamBoxは引数なしで作成
                 if !arguments.is_empty() {
@@ -694,7 +746,8 @@ impl NyashInterpreter {
             "FileBox" | "ResultBox" | "FutureBox" | "ChannelBox" | "MathBox" | 
             "TimeBox" | "DateTimeBox" | "TimerBox" | "RandomBox" | "SoundBox" | 
             "DebugBox" | "MethodBox" | "NullBox" | "ConsoleBox" | "FloatBox" |
-            "BufferBox" | "RegexBox" | "JSONBox" | "StreamBox" | "HTTPClientBox"
+            "BufferBox" | "RegexBox" | "JSONBox" | "StreamBox" | "HTTPClientBox" |
+            "IntentBox" | "P2PBox"
         );
         
         // Web専用Box（WASM環境のみ）
diff --git a/test_p2p_basic.nyash b/test_p2p_basic.nyash
new file mode 100644
index 00000000..13518870
--- /dev/null
+++ b/test_p2p_basic.nyash
@@ -0,0 +1,61 @@
+// 🧪 P2PBox基本機能テスト
+// IntentBoxとP2PBoxの基本的な動作を検証
+
+print("=== P2PBox Basic Test ===")
+
+// 1. IntentBoxの作成
+print("\n1. Creating IntentBox...")
+local world
+world = new IntentBox()
+print("✅ IntentBox created: " + world.type())
+
+// 2. P2PBoxノードの作成
+print("\n2. Creating P2PBox nodes...")
+local alice
+local bob
+local charlie
+
+alice = new P2PBox("alice", world)
+bob = new P2PBox("bob", world)
+charlie = new P2PBox("charlie", world)
+
+print("✅ Alice created: " + alice.getNodeId())
+print("✅ Bob created: " + bob.getNodeId())
+print("✅ Charlie created: " + charlie.getNodeId())
+
+// 3. リスナー登録テスト
+print("\n3. Testing listener registration...")
+bob.on("greeting", "bob_greeting_handler")
+charlie.on("greeting", "charlie_greeting_handler")
+print("✅ Listeners registered")
+
+// 4. 直接送信テスト
+print("\n4. Testing direct send...")
+alice.send("greeting", "Hello Bob!", "bob")
+alice.send("greeting", "Hello Charlie!", "charlie")
+print("✅ Messages sent")
+
+// 5. ブロードキャストテスト
+print("\n5. Testing broadcast...")
+alice.broadcast("announcement", "Hello everyone!")
+print("✅ Broadcast sent")
+
+// 6. リスナー解除テスト
+print("\n6. Testing listener removal...")
+local result
+result = bob.off("greeting")
+print("✅ Bob's listener removed: " + result)
+
+// 7. 解除後の送信テスト
+print("\n7. Testing send after listener removal...")
+alice.send("greeting", "Hello again Bob!", "bob")
+print("✅ Message sent (Bob should not receive)")
+
+// 8. 複数リスナーテスト
+print("\n8. Testing multiple listeners...")
+charlie.on("data", "charlie_data_handler1")
+charlie.on("data", "charlie_data_handler2")
+alice.send("data", "Test data", "charlie")
+print("✅ Multiple listeners tested")
+
+print("\n=== Test Complete ===")
\ No newline at end of file
diff --git a/test_p2p_callback_demo.nyash b/test_p2p_callback_demo.nyash
new file mode 100644
index 00000000..5a04eddf
--- /dev/null
+++ b/test_p2p_callback_demo.nyash
@@ -0,0 +1,94 @@
+// 🧪 P2PBox コールバック実行デモ
+// 実際のメッセージ受信とコールバック実行の様子を確認
+
+print("=== P2PBox Callback Demo ===")
+
+// 通信世界を作成
+local world
+world = new IntentBox()
+
+print("\n1. Creating chat nodes...")
+local alice
+local bob
+alice = new P2PBox("alice", world)
+bob = new P2PBox("bob", world)
+print("✅ Alice and Bob joined the chat")
+
+// 現在はコールバックを実際に実行できないため、
+// 登録と送信の流れを示すデモンストレーション
+print("\n2. Registering message handlers...")
+print("⚠️  Note: Callbacks are registered but not executed in current implementation")
+print("   (MethodBox integration pending)")
+
+// Bobのメッセージハンドラー登録
+bob.on("chat", "bob_chat_handler")
+bob.on("typing", "bob_typing_handler")
+bob.on("image", "bob_image_handler")
+print("✅ Bob's handlers registered")
+
+// Aliceのメッセージハンドラー登録
+alice.on("chat", "alice_chat_handler") 
+alice.on("reply", "alice_reply_handler")
+print("✅ Alice's handlers registered")
+
+print("\n3. Message exchange simulation...")
+
+// チャットメッセージ
+local chatMsg
+chatMsg = new MapBox()
+chatMsg.set("text", "Hi Bob! How are you?")
+chatMsg.set("timestamp", 1234567890)
+alice.send("chat", chatMsg, "bob")
+print("Alice → Bob: Hi Bob! How are you?")
+
+// タイピング通知
+alice.send("typing", true, "bob")
+print("Alice → Bob: [typing...]")
+
+// 画像送信
+local imageMsg
+imageMsg = new MapBox()
+imageMsg.set("url", "https://example.com/photo.jpg")
+imageMsg.set("caption", "Check out this photo!")
+alice.send("image", imageMsg, "bob")
+print("Alice → Bob: [sent an image]")
+
+// 返信
+local replyMsg
+replyMsg = new MapBox()
+replyMsg.set("text", "I'm doing great, thanks!")
+replyMsg.set("replyTo", "Hi Bob! How are you?")
+bob.send("reply", replyMsg, "alice")
+print("Bob → Alice: I'm doing great, thanks!")
+
+print("\n4. Broadcast demo...")
+// 全員への通知
+local announcement
+announcement = new MapBox()
+announcement.set("type", "system")
+announcement.set("message", "Welcome to NyaMesh P2P Chat!")
+alice.broadcast("announcement", announcement)
+print("System broadcast: Welcome to NyaMesh P2P Chat!")
+
+print("\n5. Testing message queue...")
+// メッセージキューの処理
+local processed
+processed = world.processMessages()
+print("Messages in queue: " + processed)
+
+print("\n6. Dynamic listener management...")
+// 動的なリスナー管理
+alice.off("chat")
+print("✅ Alice unsubscribed from chat")
+
+// 解除後のメッセージ（受信されない）
+bob.send("chat", "Are you still there?", "alice")
+print("Bob → Alice: Are you still there? (Alice won't receive)")
+
+print("\n=== Demo Complete ===")
+print("\n📝 Summary:")
+print("- IntentBox creates communication worlds")
+print("- P2PBox nodes can join and exchange messages")
+print("- Listeners can be dynamically added/removed")
+print("- LocalTransport handles in-process messaging")
+print("- Full callback execution requires MethodBox integration")
\ No newline at end of file
diff --git a/test_p2p_edge_cases.nyash b/test_p2p_edge_cases.nyash
new file mode 100644
index 00000000..f7384612
--- /dev/null
+++ b/test_p2p_edge_cases.nyash
@@ -0,0 +1,86 @@
+// 🧪 P2PBox エッジケーステスト
+// エラーハンドリングと異常系の動作検証
+
+print("=== P2PBox Edge Cases Test ===")
+
+// 基本セットアップ
+local world
+world = new IntentBox()
+
+local node1
+node1 = new P2PBox("node1", world)
+
+print("\n1. Testing invalid target send")
+// 存在しないノードへの送信
+local result
+result = node1.send("test", "data", "non_existent_node")
+print("Send to non-existent node: " + result)
+
+print("\n2. Testing empty intent string")
+// 空のintent文字列
+node1.on("", "empty_handler")
+result = node1.send("", "test data", "node1")
+print("Empty intent handled: " + result)
+
+print("\n3. Testing duplicate listener removal")
+// 同じintentを2回削除
+node1.on("test_event", "handler1")
+result = node1.off("test_event")
+print("First removal: " + result)
+result = node1.off("test_event")
+print("Second removal: " + result)
+
+print("\n4. Testing self-messaging")
+// 自分自身へのメッセージ送信
+node1.on("self_msg", "self_handler")
+result = node1.send("self_msg", "Hello myself!", "node1")
+print("Self message sent: " + result)
+
+print("\n5. Testing very long intent names")
+// 非常に長いintent名
+local longIntent
+longIntent = "this_is_a_very_long_intent_name_that_tests_the_system_limits_1234567890_abcdefghijklmnopqrstuvwxyz"
+node1.on(longIntent, "long_handler")
+result = node1.send(longIntent, "test", "node1")
+print("Long intent handled: " + result)
+
+print("\n6. Testing special characters in node ID")
+// 特殊文字を含むノードID（新規作成時）
+local specialNode
+specialNode = new P2PBox("node-with-special_chars.123", world)
+print("Special node created: " + specialNode.getNodeId())
+
+print("\n7. Testing rapid fire messages")
+// 高速連続メッセージ送信
+local node2
+node2 = new P2PBox("node2", world)
+node2.on("rapid", "rapid_handler")
+
+local i
+i = 0
+loop(i < 10) {
+    node1.send("rapid", "Message " + i, "node2")
+    i = i + 1
+}
+print("Sent 10 rapid messages")
+
+print("\n8. Testing null data send")
+// nullデータの送信
+local nullData
+nullData = new NullBox()
+result = node1.send("null_test", nullData, "node2")
+print("Null data sent: " + result)
+
+print("\n9. Testing listener with same intent multiple times")
+// 同じintentに複数のリスナー登録
+node1.on("multi", "handler1")
+node1.on("multi", "handler2")
+node1.on("multi", "handler3")
+print("Multiple handlers registered for same intent")
+
+print("\n10. Testing IntentBox message processing")
+// IntentBoxの内部メッセージ処理
+result = world.processMessages()
+print("IntentBox processed messages: " + result)
+
+print("\n=== Edge Cases Test Complete ===")
\ No newline at end of file
diff --git a/test_p2p_message_types.nyash b/test_p2p_message_types.nyash
new file mode 100644
index 00000000..fd03eab9
--- /dev/null
+++ b/test_p2p_message_types.nyash
@@ -0,0 +1,66 @@
+// 🧪 P2PBox メッセージ型テスト
+// 様々なデータ型のメッセージ送受信を検証
+
+print("=== P2PBox Message Types Test ===")
+
+// 通信世界とノードを作成
+local world
+world = new IntentBox()
+
+local sender
+local receiver
+sender = new P2PBox("sender", world)
+receiver = new P2PBox("receiver", world)
+
+// 各種データ型のリスナーを登録
+receiver.on("string_msg", "handle_string")
+receiver.on("integer_msg", "handle_integer")
+receiver.on("bool_msg", "handle_bool")
+receiver.on("null_msg", "handle_null")
+receiver.on("array_msg", "handle_array")
+receiver.on("map_msg", "handle_map")
+
+print("\n1. String message test")
+sender.send("string_msg", "Hello, P2P World!", "receiver")
+
+print("\n2. Integer message test")
+sender.send("integer_msg", 42, "receiver")
+
+print("\n3. Boolean message test")
+sender.send("bool_msg", true, "receiver")
+
+print("\n4. Null message test")
+local nullValue
+nullValue = new NullBox()
+sender.send("null_msg", nullValue, "receiver")
+
+print("\n5. Array message test (NOT IMPLEMENTED YET)")
+// TODO: ArrayBox実装後に有効化
+// local arr
+// arr = new ArrayBox()
+// arr.push("item1")
+// arr.push("item2")
+// sender.send("array_msg", arr, "receiver")
+
+print("\n6. Map message test")
+local data
+data = new MapBox()
+data.set("name", "Alice")
+data.set("age", 25)
+data.set("active", true)
+sender.send("map_msg", data, "receiver")
+
+print("\n7. Complex nested data test")
+local complex
+complex = new MapBox()
+complex.set("type", "user_profile")
+
+local details
+details = new MapBox()
+details.set("username", "alice123")
+details.set("email", "alice@example.com")
+complex.set("details", details)
+
+sender.broadcast("complex_data", complex)
+
+print("\n=== Message Types Test Complete ===")
\ No newline at end of file