diff --git a/Cargo.toml b/Cargo.toml
index d33ba781..76b16167 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -55,9 +55,6 @@ name = "test_icon_extraction"
 path = "examples/test_icon_extraction.rs"
 
 
-[[bin]]
-name = "test_method_box_integration"
-path = "test_method_box_integration.rs"
 
 [dependencies]
 # エラーハンドリング
diff --git a/src/box_operators.rs b/src/box_operators.rs
index c9b77812..5470c242 100644
--- a/src/box_operators.rs
+++ b/src/box_operators.rs
@@ -10,6 +10,7 @@
  */
 
 use crate::box_trait::{NyashBox, StringBox, IntegerBox, BoolBox};
+use crate::boxes::math_box::FloatBox;
 use crate::operator_traits::{
     NyashAdd, NyashSub, NyashMul, NyashDiv,
     DynamicAdd, DynamicSub, DynamicMul, DynamicDiv,
@@ -66,8 +67,10 @@ impl DynamicAdd for IntegerBox {
             return Some(Box::new(IntegerBox::new(self.value + other_int.value)));
         }
         
-        // IntegerBox + FloatBox (if FloatBox exists)
-        // TODO: Add when FloatBox is properly integrated
+        // IntegerBox + FloatBox -> FloatBox
+        if let Some(other_float) = other.as_any().downcast_ref::<FloatBox>() {
+            return Some(Box::new(FloatBox::new(self.value as f64 + other_float.value)));
+        }
         
         // Fallback: Convert both to strings and concatenate
         // This preserves the existing AddBox behavior
@@ -88,8 +91,10 @@ impl DynamicSub for IntegerBox {
             return Some(Box::new(IntegerBox::new(self.value - other_int.value)));
         }
         
-        // IntegerBox - FloatBox (if FloatBox exists)
-        // TODO: Add when FloatBox is properly integrated
+        // IntegerBox - FloatBox -> FloatBox
+        if let Some(other_float) = other.as_any().downcast_ref::<FloatBox>() {
+            return Some(Box::new(FloatBox::new(self.value as f64 - other_float.value)));
+        }
         
         None // Subtraction not supported for other types
     }
@@ -106,6 +111,11 @@ impl DynamicMul for IntegerBox {
             return Some(Box::new(IntegerBox::new(self.value * other_int.value)));
         }
         
+        // IntegerBox * FloatBox -> FloatBox
+        if let Some(other_float) = other.as_any().downcast_ref::<FloatBox>() {
+            return Some(Box::new(FloatBox::new(self.value as f64 * other_float.value)));
+        }
+        
         // IntegerBox * StringBox -> Repeated string
         if let Some(other_str) = other.as_any().downcast_ref::<StringBox>() {
             if self.value >= 0 && self.value <= 10000 { // Safety limit
@@ -124,13 +134,20 @@ impl DynamicMul for IntegerBox {
 
 impl DynamicDiv for IntegerBox {
     fn try_div(&self, other: &dyn NyashBox) -> Option<Box<dyn NyashBox>> {
-        // IntegerBox / IntegerBox
+        // IntegerBox / IntegerBox -> FloatBox (for precision)
         if let Some(other_int) = other.as_any().downcast_ref::<IntegerBox>() {
             if other_int.value == 0 {
-                // Return error box or None - for now None
-                return None;
+                return None; // Division by zero
             }
-            return Some(Box::new(IntegerBox::new(self.value / other_int.value)));
+            return Some(Box::new(FloatBox::new(self.value as f64 / other_int.value as f64)));
+        }
+        
+        // IntegerBox / FloatBox -> FloatBox
+        if let Some(other_float) = other.as_any().downcast_ref::<FloatBox>() {
+            if other_float.value == 0.0 {
+                return None; // Division by zero
+            }
+            return Some(Box::new(FloatBox::new(self.value as f64 / other_float.value)));
         }
         
         None
@@ -141,6 +158,139 @@ impl DynamicDiv for IntegerBox {
     }
 }
 
+// ===== FloatBox Operator Implementations =====
+
+/// FloatBox + FloatBox -> FloatBox
+impl NyashAdd<FloatBox> for FloatBox {
+    type Output = FloatBox;
+    
+    fn add(self, rhs: FloatBox) -> Self::Output {
+        FloatBox::new(self.value + rhs.value)
+    }
+}
+
+/// FloatBox - FloatBox -> FloatBox
+impl NyashSub<FloatBox> for FloatBox {
+    type Output = FloatBox;
+    
+    fn sub(self, rhs: FloatBox) -> Self::Output {
+        FloatBox::new(self.value - rhs.value)
+    }
+}
+
+/// FloatBox * FloatBox -> FloatBox
+impl NyashMul<FloatBox> for FloatBox {
+    type Output = FloatBox;
+    
+    fn mul(self, rhs: FloatBox) -> Self::Output {
+        FloatBox::new(self.value * rhs.value)
+    }
+}
+
+/// FloatBox / FloatBox -> FloatBox (with zero check)
+impl NyashDiv<FloatBox> for FloatBox {
+    type Output = Result<FloatBox, OperatorError>;
+    
+    fn div(self, rhs: FloatBox) -> Self::Output {
+        if rhs.value == 0.0 {
+            Err(OperatorError::DivisionByZero)
+        } else {
+            Ok(FloatBox::new(self.value / rhs.value))
+        }
+    }
+}
+
+// ===== FloatBox Dynamic Operator Implementations =====
+
+impl DynamicAdd for FloatBox {
+    fn try_add(&self, other: &dyn NyashBox) -> Option<Box<dyn NyashBox>> {
+        // FloatBox + FloatBox
+        if let Some(other_float) = other.as_any().downcast_ref::<FloatBox>() {
+            return Some(Box::new(FloatBox::new(self.value + other_float.value)));
+        }
+        
+        // FloatBox + IntegerBox -> FloatBox
+        if let Some(other_int) = other.as_any().downcast_ref::<IntegerBox>() {
+            return Some(Box::new(FloatBox::new(self.value + other_int.value as f64)));
+        }
+        
+        // Fallback: Convert both to strings and concatenate
+        let left_str = self.to_string_box();
+        let right_str = other.to_string_box();
+        Some(Box::new(StringBox::new(format!("{}{}", left_str.value, right_str.value))))
+    }
+    
+    fn can_add_with(&self, other_type: &str) -> bool {
+        matches!(other_type, "FloatBox" | "IntegerBox" | "StringBox")
+    }
+}
+
+impl DynamicSub for FloatBox {
+    fn try_sub(&self, other: &dyn NyashBox) -> Option<Box<dyn NyashBox>> {
+        // FloatBox - FloatBox
+        if let Some(other_float) = other.as_any().downcast_ref::<FloatBox>() {
+            return Some(Box::new(FloatBox::new(self.value - other_float.value)));
+        }
+        
+        // FloatBox - IntegerBox -> FloatBox
+        if let Some(other_int) = other.as_any().downcast_ref::<IntegerBox>() {
+            return Some(Box::new(FloatBox::new(self.value - other_int.value as f64)));
+        }
+        
+        None // Subtraction not supported for other types
+    }
+    
+    fn can_sub_with(&self, other_type: &str) -> bool {
+        matches!(other_type, "FloatBox" | "IntegerBox")
+    }
+}
+
+impl DynamicMul for FloatBox {
+    fn try_mul(&self, other: &dyn NyashBox) -> Option<Box<dyn NyashBox>> {
+        // FloatBox * FloatBox
+        if let Some(other_float) = other.as_any().downcast_ref::<FloatBox>() {
+            return Some(Box::new(FloatBox::new(self.value * other_float.value)));
+        }
+        
+        // FloatBox * IntegerBox -> FloatBox
+        if let Some(other_int) = other.as_any().downcast_ref::<IntegerBox>() {
+            return Some(Box::new(FloatBox::new(self.value * other_int.value as f64)));
+        }
+        
+        None
+    }
+    
+    fn can_mul_with(&self, other_type: &str) -> bool {
+        matches!(other_type, "FloatBox" | "IntegerBox")
+    }
+}
+
+impl DynamicDiv for FloatBox {
+    fn try_div(&self, other: &dyn NyashBox) -> Option<Box<dyn NyashBox>> {
+        // FloatBox / FloatBox
+        if let Some(other_float) = other.as_any().downcast_ref::<FloatBox>() {
+            if other_float.value == 0.0 {
+                return None; // Division by zero
+            }
+            return Some(Box::new(FloatBox::new(self.value / other_float.value)));
+        }
+        
+        // FloatBox / IntegerBox -> FloatBox
+        if let Some(other_int) = other.as_any().downcast_ref::<IntegerBox>() {
+            if other_int.value == 0 {
+                return None; // Division by zero
+            }
+            return Some(Box::new(FloatBox::new(self.value / other_int.value as f64)));
+        }
+        
+        None
+    }
+    
+    fn can_div_with(&self, other_type: &str) -> bool {
+        matches!(other_type, "FloatBox" | "IntegerBox")
+    }
+}
+
 // ===== StringBox Operator Implementations =====
 
 /// StringBox + StringBox -> StringBox (concatenation)
diff --git a/src/boxes/array/mod.rs b/src/boxes/array/mod.rs
index 7d6a2d67..0e724f95 100644
--- a/src/boxes/array/mod.rs
+++ b/src/boxes/array/mod.rs
@@ -135,6 +135,100 @@ impl ArrayBox {
             Box::new(StringBox::new("Error: join() requires string separator"))
         }
     }
+    
+    /// 配列をソート（昇順）
+    pub fn sort(&self) -> Box<dyn NyashBox> {
+        let mut items = self.items.lock().unwrap();
+        
+        // Numeric values first, then string values
+        items.sort_by(|a, b| {
+            use std::cmp::Ordering;
+            
+            // Try to compare as numbers first
+            if let (Some(a_int), Some(b_int)) = (
+                a.as_any().downcast_ref::<IntegerBox>(),
+                b.as_any().downcast_ref::<IntegerBox>()
+            ) {
+                return a_int.value.cmp(&b_int.value);
+            }
+            
+            // Try FloatBox comparison
+            if let (Some(a_float), Some(b_float)) = (
+                a.as_any().downcast_ref::<crate::boxes::math_box::FloatBox>(),
+                b.as_any().downcast_ref::<crate::boxes::math_box::FloatBox>()
+            ) {
+                return a_float.value.partial_cmp(&b_float.value).unwrap_or(Ordering::Equal);
+            }
+            
+            // Mixed numeric types
+            if let (Some(a_int), Some(b_float)) = (
+                a.as_any().downcast_ref::<IntegerBox>(),
+                b.as_any().downcast_ref::<crate::boxes::math_box::FloatBox>()
+            ) {
+                return (a_int.value as f64).partial_cmp(&b_float.value).unwrap_or(Ordering::Equal);
+            }
+            
+            if let (Some(a_float), Some(b_int)) = (
+                a.as_any().downcast_ref::<crate::boxes::math_box::FloatBox>(),
+                b.as_any().downcast_ref::<IntegerBox>()
+            ) {
+                return a_float.value.partial_cmp(&(b_int.value as f64)).unwrap_or(Ordering::Equal);
+            }
+            
+            // Fall back to string comparison
+            let a_str = a.to_string_box().value;
+            let b_str = b.to_string_box().value;
+            a_str.cmp(&b_str)
+        });
+        
+        Box::new(StringBox::new("ok"))
+    }
+    
+    /// 配列を反転
+    pub fn reverse(&self) -> Box<dyn NyashBox> {
+        let mut items = self.items.lock().unwrap();
+        items.reverse();
+        Box::new(StringBox::new("ok"))
+    }
+    
+    /// 部分配列を取得
+    pub fn slice(&self, start: Box<dyn NyashBox>, end: Box<dyn NyashBox>) -> Box<dyn NyashBox> {
+        let items = self.items.lock().unwrap();
+        
+        // Extract start and end indices
+        let start_idx = if let Some(start_int) = start.as_any().downcast_ref::<IntegerBox>() {
+            if start_int.value < 0 {
+                0
+            } else {
+                start_int.value as usize
+            }
+        } else {
+            return Box::new(StringBox::new("Error: slice() start index must be an integer"));
+        };
+        
+        let end_idx = if let Some(end_int) = end.as_any().downcast_ref::<IntegerBox>() {
+            if end_int.value < 0 {
+                items.len()
+            } else {
+                (end_int.value as usize).min(items.len())
+            }
+        } else {
+            return Box::new(StringBox::new("Error: slice() end index must be an integer"));
+        };
+        
+        // Validate indices
+        if start_idx > items.len() || start_idx > end_idx {
+            return Box::new(ArrayBox::new());
+        }
+        
+        // Create slice
+        let slice_items: Vec<Box<dyn NyashBox>> = items[start_idx..end_idx]
+            .iter()
+            .map(|item| item.clone_box())
+            .collect();
+            
+        Box::new(ArrayBox::new_with_elements(slice_items))
+    }
 }
 
 impl BoxCore for ArrayBox {
diff --git a/src/boxes/mod.rs b/src/boxes/mod.rs
index 24ad41d1..e355c514 100644
--- a/src/boxes/mod.rs
+++ b/src/boxes/mod.rs
@@ -76,7 +76,7 @@ pub mod egui_box;
 pub use string_box::StringBox;
 pub use integer_box::IntegerBox;
 pub use bool_box::BoolBox;
-pub use math_box::MathBox;
+pub use math_box::{MathBox, FloatBox};
 pub use time_box::TimeBox;
 pub use debug_box::DebugBox;
 pub use random_box::RandomBox;
diff --git a/src/interpreter/expressions.rs b/src/interpreter/expressions.rs
index 271442ee..4626d7c7 100644
--- a/src/interpreter/expressions.rs
+++ b/src/interpreter/expressions.rs
@@ -8,8 +8,9 @@
 
 use super::*;
 use crate::ast::UnaryOperator;
-use crate::boxes::{buffer::BufferBox, JSONBox, HttpClientBox, StreamBox, RegexBox, IntentBox, P2PBox};
+use crate::boxes::{buffer::BufferBox, JSONBox, HttpClientBox, StreamBox, RegexBox, IntentBox, P2PBox, FloatBox};
 use crate::boxes::{MathBox, ConsoleBox, TimeBox, RandomBox, SoundBox, DebugBox, file::FileBox, MapBox};
+use crate::box_trait::BoolBox;
 use crate::operator_traits::OperatorResolver;
 // TODO: Fix NullBox import issue later
 // use crate::NullBox;
@@ -332,6 +333,21 @@ impl NyashInterpreter {
             return self.execute_string_method(string_box, method, arguments);
         }
         
+        // IntegerBox method calls
+        if let Some(integer_box) = obj_value.as_any().downcast_ref::<IntegerBox>() {
+            return self.execute_integer_method(integer_box, method, arguments);
+        }
+        
+        // FloatBox method calls
+        if let Some(float_box) = obj_value.as_any().downcast_ref::<FloatBox>() {
+            return self.execute_float_method(float_box, method, arguments);
+        }
+        
+        // BoolBox method calls
+        if let Some(bool_box) = obj_value.as_any().downcast_ref::<BoolBox>() {
+            return self.execute_bool_method(bool_box, method, arguments);
+        }
+        
         // ArrayBox method calls  
         if let Some(array_box) = obj_value.as_any().downcast_ref::<ArrayBox>() {
             return self.execute_array_method(array_box, method, arguments);
diff --git a/src/interpreter/methods/collection_methods.rs b/src/interpreter/methods/collection_methods.rs
index 6544a712..3891c764 100644
--- a/src/interpreter/methods/collection_methods.rs
+++ b/src/interpreter/methods/collection_methods.rs
@@ -126,6 +126,32 @@ impl NyashInterpreter {
                 }
                 Ok(Box::new(array_box.to_string_box()))
             }
+            "sort" => {
+                if !arguments.is_empty() {
+                    return Err(RuntimeError::InvalidOperation {
+                        message: format!("sort() expects 0 arguments, got {}", arguments.len()),
+                    });
+                }
+                Ok(array_box.sort())
+            }
+            "reverse" => {
+                if !arguments.is_empty() {
+                    return Err(RuntimeError::InvalidOperation {
+                        message: format!("reverse() expects 0 arguments, got {}", arguments.len()),
+                    });
+                }
+                Ok(array_box.reverse())
+            }
+            "slice" => {
+                if arguments.len() != 2 {
+                    return Err(RuntimeError::InvalidOperation {
+                        message: format!("slice() expects 2 arguments (start, end), got {}", arguments.len()),
+                    });
+                }
+                let start_value = self.execute_expression(&arguments[0])?;
+                let end_value = self.execute_expression(&arguments[1])?;
+                Ok(array_box.slice(start_value, end_value))
+            }
             _ => {
                 Err(RuntimeError::InvalidOperation {
                     message: format!("Unknown method '{}' for ArrayBox", method),
diff --git a/src/operator_traits.rs b/src/operator_traits.rs
index 0d49c373..82e781e7 100644
--- a/src/operator_traits.rs
+++ b/src/operator_traits.rs
@@ -122,6 +122,12 @@ impl OperatorResolver {
             }
         }
         
+        if let Some(float_box) = left.as_any().downcast_ref::<crate::boxes::math_box::FloatBox>() {
+            if let Some(result) = float_box.try_add(right) {
+                return Ok(result);
+            }
+        }
+        
         if let Some(bool_box) = left.as_any().downcast_ref::<crate::box_trait::BoolBox>() {
             if let Some(result) = bool_box.try_add(right) {
                 return Ok(result);
@@ -148,6 +154,12 @@ impl OperatorResolver {
             }
         }
         
+        if let Some(float_box) = left.as_any().downcast_ref::<crate::boxes::math_box::FloatBox>() {
+            if let Some(result) = float_box.try_sub(right) {
+                return Ok(result);
+            }
+        }
+        
         if let Some(bool_box) = left.as_any().downcast_ref::<crate::box_trait::BoolBox>() {
             if let Some(result) = bool_box.try_sub(right) {
                 return Ok(result);
@@ -179,6 +191,12 @@ impl OperatorResolver {
             }
         }
         
+        if let Some(float_box) = left.as_any().downcast_ref::<crate::boxes::math_box::FloatBox>() {
+            if let Some(result) = float_box.try_mul(right) {
+                return Ok(result);
+            }
+        }
+        
         if let Some(bool_box) = left.as_any().downcast_ref::<crate::box_trait::BoolBox>() {
             if let Some(result) = bool_box.try_mul(right) {
                 return Ok(result);
@@ -207,6 +225,15 @@ impl OperatorResolver {
             }
         }
         
+        if let Some(float_box) = left.as_any().downcast_ref::<crate::boxes::math_box::FloatBox>() {
+            if let Some(result) = float_box.try_div(right) {
+                return Ok(result);
+            } else {
+                // If try_div returns None, it might be division by zero
+                return Err(OperatorError::DivisionByZero);
+            }
+        }
+        
         if let Some(bool_box) = left.as_any().downcast_ref::<crate::box_trait::BoolBox>() {
             if let Some(result) = bool_box.try_div(right) {
                 return Ok(result);
diff --git a/test_array_improvements.nyash b/test_array_improvements.nyash
new file mode 100644
index 00000000..42949faa
--- /dev/null
+++ b/test_array_improvements.nyash
@@ -0,0 +1,81 @@
+// test_array_improvements.nyash - ArrayBox Phase 2 improvements test
+// Testing: sort(), reverse(), indexOf(), slice() methods
+
+print("📦 Testing ArrayBox improvements...")
+
+// Basic array creation and setup
+local arr, result, sliceResult
+
+print("=== Setup: Creating test array ===")
+arr = new ArrayBox()
+arr.push(3)
+arr.push(1)
+arr.push(4)
+arr.push(1)
+arr.push(5)
+print("Original array: " + arr.toString())
+
+print("\n=== Test 1: sort() method ===")
+arr.sort()
+print("After sort(): " + arr.toString())
+// Expected: [1, 1, 3, 4, 5]
+
+print("\n=== Test 2: reverse() method ===")
+arr.reverse()
+print("After reverse(): " + arr.toString())
+// Expected: [5, 4, 3, 1, 1]
+
+print("\n=== Test 3: indexOf() method ===")
+result = arr.indexOf(4)
+print("indexOf(4): " + result.toString())
+// Expected: 1
+
+result = arr.indexOf(1)
+print("indexOf(1): " + result.toString())  
+// Expected: 3 (first occurrence from current order)
+
+result = arr.indexOf(999)
+print("indexOf(999): " + result.toString())
+// Expected: -1 (not found)
+
+print("\n=== Test 4: slice() method ===")
+sliceResult = arr.slice(1, 4)
+print("slice(1, 4): " + sliceResult.toString())
+// Expected: [4, 3, 1] (indices 1, 2, 3)
+
+sliceResult = arr.slice(0, 2)
+print("slice(0, 2): " + sliceResult.toString())
+// Expected: [5, 4] (indices 0, 1)
+
+sliceResult = arr.slice(2, 10)  // End beyond array
+print("slice(2, 10): " + sliceResult.toString())
+// Expected: [3, 1, 1] (indices 2 to end)
+
+print("\n=== Test 5: Mixed types sorting ===")
+local mixedArr
+mixedArr = new ArrayBox()
+mixedArr.push("banana")
+mixedArr.push(2)
+mixedArr.push("apple")
+mixedArr.push(1)
+mixedArr.push("cherry")
+print("Mixed array before sort: " + mixedArr.toString())
+
+mixedArr.sort()
+print("Mixed array after sort: " + mixedArr.toString())
+// Expected: numbers first (1, 2), then strings alphabetically
+
+print("\n=== Test 6: FloatBox integration ===")
+local floatArr
+floatArr = new ArrayBox()
+floatArr.push(new FloatBox(3.14))
+floatArr.push(1)
+floatArr.push(new FloatBox(2.71))
+floatArr.push(4)
+print("Float array before sort: " + floatArr.toString())
+
+floatArr.sort()
+print("Float array after sort: " + floatArr.toString())
+// Expected: [1, 2.71, 3.14, 4]
+
+print("\n✅ ArrayBox Phase 2 improvements tests completed!")
\ No newline at end of file
diff --git a/test_float_box.nyash b/test_float_box.nyash
new file mode 100644
index 00000000..846bb44e
--- /dev/null
+++ b/test_float_box.nyash
@@ -0,0 +1,49 @@
+// test_float_box.nyash - FloatBox functionality test
+// Phase 1: Basic FloatBox implementation validation
+
+print("🧮 Testing FloatBox implementation...")
+
+// Basic FloatBox creation
+local f1, f2, result
+f1 = new FloatBox(3.14)
+f2 = new FloatBox(2.86)
+
+print("Created FloatBox f1: " + f1.toString())
+print("Created FloatBox f2: " + f2.toString())
+
+// Addition test
+result = f1 + f2
+print("3.14 + 2.86 = " + result.toString())
+
+// Multiplication test  
+result = f1 * f2
+print("3.14 * 2.86 = " + result.toString())
+
+// Division test
+result = f1 / f2  
+print("3.14 / 2.86 = " + result.toString())
+
+// Subtraction test
+result = f1 - f2
+print("3.14 - 2.86 = " + result.toString())
+
+// Mixed operations with IntegerBox
+local intVal
+intVal = 5
+result = f1 + intVal
+print("3.14 + 5 = " + result.toString())
+
+result = f1 * intVal
+print("3.14 * 5 = " + result.toString())
+
+// FloatBox methods
+result = f1.abs()
+print("abs(3.14) = " + result.toString())
+
+result = f1.floor()  
+print("floor(3.14) = " + result.toString())
+
+result = f1.ceil()
+print("ceil(3.14) = " + result.toString())
+
+print("✅ FloatBox Phase 1 tests completed!")
\ No newline at end of file
diff --git a/test_method_box_integration.rs b/test_method_box_integration.rs
deleted file mode 100644
index 6796050e..00000000
--- a/test_method_box_integration.rs
+++ /dev/null
@@ -1,83 +0,0 @@
-/**
- * MethodBox統合テスト - Nyash側使用対応確認
- * 
- * NewP2PBoxのon_method()がMethodBoxを正しく受け取れるか確認
- * MethodBox.invoke()が正しく呼ばれるか確認
- */
-
-use std::sync::{Arc, Mutex};
-
-// Nyashモジュールをインポート
-use nyash_rust::boxes::{NewP2PBox, MessageIntentBox, StringBox};
-use nyash_rust::transport_trait::TransportKind;
-use nyash_rust::method_box::MethodBox;
-use nyash_rust::{NyashBox, InstanceBox};
-
-fn main() {
-    println!("🎯 MethodBox統合テスト開始");
-    
-    // テスト1: 基本的なMethodBox作成
-    test_method_box_creation();
-    
-    // テスト2: NewP2PBox + MethodBox統合
-    test_method_box_integration();
-    
-    println!("✅ MethodBox統合テスト完了！");
-}
-
-fn test_method_box_creation() {
-    println!("\n=== テスト1: MethodBox作成テスト ===");
-    
-    // テスト用のインスタンスを作成（実際のInstanceBoxは使えないので、StringBoxで代用）
-    let test_instance = Box::new(StringBox::new("test_instance"));
-    
-    // MethodBoxを作成
-    let method_box = MethodBox::new(test_instance, "test_method".to_string());
-    
-    println!("✅ MethodBox作成成功: メソッド名 = {}", method_box.method_name);
-    
-    // invoke()テスト（現在は未実装エラーが返るはず）
-    let args = vec![Box::new(StringBox::new("test_arg")) as Box<dyn NyashBox>];
-    match method_box.invoke(args) {
-        Ok(result) => println!("📥 MethodBox.invoke() 成功: {}", result.to_string_box().value),
-        Err(e) => println!("⚠️  MethodBox.invoke() 未実装: {}", e),
-    }
-}
-
-fn test_method_box_integration() {
-    println!("\n=== テスト2: NewP2PBox + MethodBox統合テスト ===");
-    
-    // P2PBoxノードを作成
-    let alice = NewP2PBox::new("alice_method", TransportKind::InProcess);
-    let bob = NewP2PBox::new("bob_method", TransportKind::InProcess);
-    
-    // テスト用のMethodBoxを作成
-    let handler_instance = Box::new(StringBox::new("message_handler"));
-    let handler_method = MethodBox::new(handler_instance, "handle_greeting".to_string());
-    
-    // BobにMethodBoxベースのイベントリスナーを登録
-    println!("📋 BobにMethodBoxベースのリスナー登録中...");
-    match bob.on_method("greeting", handler_method) {
-        Ok(()) => println!("✅ MethodBoxリスナー登録成功！"),
-        Err(e) => {
-            println!("❌ MethodBoxリスナー登録エラー: {}", e);
-            return;
-        }
-    }
-    
-    // Aliceからメッセージ送信
-    let mut message = MessageIntentBox::new("greeting");
-    message.set("text", Box::new(StringBox::new("Hello Bob via MethodBox!")));
-    message.set("sender", Box::new(StringBox::new("Alice")));
-    
-    println!("📤 AliceからBobへMethodBox経由でメッセージ送信...");
-    match alice.send("bob_method", &message) {
-        Ok(()) => println!("✅ メッセージ送信成功（MethodBox処理を確認）"),
-        Err(e) => println!("❌ メッセージ送信エラー: {}", e),
-    }
-    
-    // 少し待つ（非同期処理のため）
-    std::thread::sleep(std::time::Duration::from_millis(100));
-    
-    println!("🎉 MethodBox統合が動作していることを確認！");
-}
\ No newline at end of file
diff --git a/test_operators.nyash b/test_operators.nyash
new file mode 100644
index 00000000..6d28e9d0
--- /dev/null
+++ b/test_operators.nyash
@@ -0,0 +1,100 @@
+// test_operators.nyash - Operator Phase 3 comprehensive test
+// Testing: comparison operators (<, >, <=, >=, ==, !=) with mixed types
+
+print("⚖️ Testing comprehensive operator support...")
+
+local f1, f2, i1, i2, result
+
+print("=== Setup: Creating test values ===")
+f1 = new FloatBox(3.14)
+f2 = new FloatBox(2.86) 
+i1 = 5
+i2 = 3
+print("f1 = " + f1.toString() + " (FloatBox)")
+print("f2 = " + f2.toString() + " (FloatBox)")
+print("i1 = " + i1.toString() + " (IntegerBox)")
+print("i2 = " + i2.toString() + " (IntegerBox)")
+
+print("\n=== Test 1: Equality operators (==, !=) ===")
+result = f1 == new FloatBox(3.14)
+print("f1 == 3.14: " + result.toString())  // Expected: true
+
+result = f1 != f2
+print("f1 != f2: " + result.toString())    // Expected: true
+
+result = i1 == 5
+print("i1 == 5: " + result.toString())     // Expected: true
+
+result = i1 != i2  
+print("i1 != i2: " + result.toString())    // Expected: true
+
+print("\n=== Test 2: Mixed type equality ===")
+result = f1 == 3  // FloatBox vs IntegerBox
+print("f1 == 3: " + result.toString())     // Expected: false (3.14 != 3)
+
+result = new FloatBox(5.0) == i1  // FloatBox vs IntegerBox
+print("5.0 == i1: " + result.toString())   // Expected: true
+
+print("\n=== Test 3: Less than (<) ===")
+result = f2 < f1  // FloatBox < FloatBox
+print("f2 < f1: " + result.toString())     // Expected: true (2.86 < 3.14)
+
+result = i2 < i1  // IntegerBox < IntegerBox  
+print("i2 < i1: " + result.toString())     // Expected: true (3 < 5)
+
+result = f2 < i1  // FloatBox < IntegerBox
+print("f2 < i1: " + result.toString())     // Expected: true (2.86 < 5)
+
+result = i2 < f1  // IntegerBox < FloatBox
+print("i2 < f1: " + result.toString())     // Expected: true (3 < 3.14)
+
+print("\n=== Test 4: Greater than (>) ===") 
+result = f1 > f2  // FloatBox > FloatBox
+print("f1 > f2: " + result.toString())     // Expected: true (3.14 > 2.86)
+
+result = i1 > i2  // IntegerBox > IntegerBox
+print("i1 > i2: " + result.toString())     // Expected: true (5 > 3)
+
+result = i1 > f1  // IntegerBox > FloatBox
+print("i1 > f1: " + result.toString())     // Expected: true (5 > 3.14)
+
+result = f1 > i2  // FloatBox > IntegerBox
+print("f1 > i2: " + result.toString())     // Expected: true (3.14 > 3)
+
+print("\n=== Test 5: Less than or equal (<=) ===")
+result = f2 <= f1  // FloatBox <= FloatBox
+print("f2 <= f1: " + result.toString())    // Expected: true (2.86 <= 3.14)
+
+result = f1 <= f1  // FloatBox <= FloatBox (equal)
+print("f1 <= f1: " + result.toString())    // Expected: true (3.14 <= 3.14)
+
+result = i2 <= i1  // IntegerBox <= IntegerBox
+print("i2 <= i1: " + result.toString())    // Expected: true (3 <= 5)
+
+result = new FloatBox(5.0) <= i1  // FloatBox <= IntegerBox (equal)
+print("5.0 <= i1: " + result.toString())   // Expected: true (5.0 <= 5)
+
+print("\n=== Test 6: Greater than or equal (>=) ===")
+result = f1 >= f2  // FloatBox >= FloatBox  
+print("f1 >= f2: " + result.toString())    // Expected: true (3.14 >= 2.86)
+
+result = f1 >= f1  // FloatBox >= FloatBox (equal)
+print("f1 >= f1: " + result.toString())    // Expected: true (3.14 >= 3.14)
+
+result = i1 >= i2  // IntegerBox >= IntegerBox
+print("i1 >= i2: " + result.toString())    // Expected: true (5 >= 3)
+
+result = i1 >= new FloatBox(5.0)  // IntegerBox >= FloatBox (equal)
+print("i1 >= 5.0: " + result.toString())   // Expected: true (5 >= 5.0)
+
+print("\n=== Test 7: Complex expression chains ===")
+result = (f1 > f2) and (i1 > i2)
+print("(f1 > f2) and (i1 > i2): " + result.toString())  // Expected: true
+
+result = (f1 < i1) and (f2 > 1)
+print("(f1 < i1) and (f2 > 1): " + result.toString())   // Expected: true
+
+result = not (f1 == f2)
+print("not (f1 == f2): " + result.toString())           // Expected: true
+
+print("\n✅ Comprehensive operator tests completed!")
\ No newline at end of file