diff --git a/apps/client/src/scenes/game/input/joystick/JoystickInputPresenter.tsx b/apps/client/src/scenes/game/input/joystick/JoystickInputPresenter.tsx
index 6ce42aa..e1db3b9 100644
--- a/apps/client/src/scenes/game/input/joystick/JoystickInputPresenter.tsx
+++ b/apps/client/src/scenes/game/input/joystick/JoystickInputPresenter.tsx
@@ -7,9 +7,6 @@
 import { JoystickView } from "./JoystickView";
 import type { UseJoystickInputPresenterProps } from "./common";
 
-/** 入力半径の既定値を外部から参照できるように再公開 */
-export { MAX_DIST } from "./common";
-
 /** 入力と表示状態の橋渡しを行う */
 export const JoystickInputPresenter = ({ onInput, maxDist }: UseJoystickInputPresenterProps) => {
   const { isMoving, center, knobOffset, radius, handleStart, handleMove, handleEnd } =
diff --git a/apps/client/src/scenes/game/input/joystick/common/index.ts b/apps/client/src/scenes/game/input/joystick/common/index.ts
index ce854ff..2333f85 100644
--- a/apps/client/src/scenes/game/input/joystick/common/index.ts
+++ b/apps/client/src/scenes/game/input/joystick/common/index.ts
@@ -21,8 +21,11 @@
 	JOYSTICK_BASE_BG_COLOR,
 	JOYSTICK_BASE_BORDER_COLOR,
 	JOYSTICK_BASE_BORDER_WIDTH,
+	JOYSTICK_DEADZONE,
 	JOYSTICK_KNOB_BG_COLOR,
 	JOYSTICK_KNOB_SHADOW,
 	JOYSTICK_KNOB_SIZE,
+	JOYSTICK_MIN_MOVEMENT_DELTA,
+	JOYSTICK_SEND_ZERO_ON_END,
 	MAX_DIST,
 } from './joystick.constants';
diff --git a/apps/client/src/scenes/game/input/joystick/common/joystick.constants.ts b/apps/client/src/scenes/game/input/joystick/common/joystick.constants.ts
index 3645788..5d87d53 100644
--- a/apps/client/src/scenes/game/input/joystick/common/joystick.constants.ts
+++ b/apps/client/src/scenes/game/input/joystick/common/joystick.constants.ts
@@ -7,6 +7,15 @@
 /** UI側と共有する最大半径の既定値 */
 export const MAX_DIST = 60;
 
+/** 微小入力をゼロ扱いにするデッドゾーン閾値 */
+export const JOYSTICK_DEADZONE = 0.08;
+
+/** 連続送信を間引く最小移動量閾値 */
+export const JOYSTICK_MIN_MOVEMENT_DELTA = 0.02;
+
+/** 入力終了時にゼロ入力を送信するかどうかの方針 */
+export const JOYSTICK_SEND_ZERO_ON_END = true;
+
 /** ジョイスティックベースの背景色 */
 export const JOYSTICK_BASE_BG_COLOR = 'rgba(255, 255, 255, 0.1)';
 
diff --git a/apps/client/src/scenes/game/input/joystick/useJoystickController.ts b/apps/client/src/scenes/game/input/joystick/useJoystickController.ts
index c371f7e..be2f033 100644
--- a/apps/client/src/scenes/game/input/joystick/useJoystickController.ts
+++ b/apps/client/src/scenes/game/input/joystick/useJoystickController.ts
@@ -4,12 +4,14 @@
  * useJoystickState の出力を受けて onInput 通知と終了時リセット通知を統一する
  */
 import { useCallback } from 'react';
+import { useRef } from 'react';
 import type {
   JoystickPointerEvent,
   NormalizedInput,
   UseJoystickControllerProps,
   UseJoystickControllerReturn,
 } from './common';
+import { JOYSTICK_MIN_MOVEMENT_DELTA, JOYSTICK_SEND_ZERO_ON_END } from './common';
 import { useJoystickState } from './useJoystickState';
 
 /** 入力イベントと通知処理を仲介するフック */
@@ -27,6 +29,8 @@
     handleEnd: baseHandleEnd,
   } = useJoystickState({ maxDist });
 
+  const lastEmittedRef = useRef<NormalizedInput | null>(null);
+
   const emitInput = useCallback(
     (normalized: NormalizedInput) => {
       onInput(normalized.x, normalized.y);
@@ -38,14 +42,31 @@
     (e: JoystickPointerEvent) => {
       const normalized = baseHandleMove(e);
       if (!normalized) return;
+
+      const last = lastEmittedRef.current;
+      if (last) {
+        const delta = Math.hypot(normalized.x - last.x, normalized.y - last.y);
+        if (delta < JOYSTICK_MIN_MOVEMENT_DELTA) {
+          return;
+        }
+      }
+
       emitInput(normalized);
+      lastEmittedRef.current = normalized;
     },
     [baseHandleMove, emitInput]
   );
 
   const handleEnd = useCallback(() => {
     baseHandleEnd();
-    emitInput({ x: 0, y: 0 });
+
+    if (JOYSTICK_SEND_ZERO_ON_END) {
+      emitInput({ x: 0, y: 0 });
+      lastEmittedRef.current = { x: 0, y: 0 };
+      return;
+    }
+
+    lastEmittedRef.current = null;
   }, [baseHandleEnd, emitInput]);
 
   return {
diff --git a/apps/client/src/scenes/game/input/joystick/useJoystickState.ts b/apps/client/src/scenes/game/input/joystick/useJoystickState.ts
index 261a127..7f38616 100644
--- a/apps/client/src/scenes/game/input/joystick/useJoystickState.ts
+++ b/apps/client/src/scenes/game/input/joystick/useJoystickState.ts
@@ -4,7 +4,7 @@
  * UI描画に必要な中心点，ノブ位置，半径を保持する
  */
 import { useCallback, useState } from 'react';
-import { MAX_DIST } from './common';
+import { JOYSTICK_DEADZONE, MAX_DIST } from './common';
 import { computeJoystick } from './JoystickModel';
 import type {
   JoystickPointerEvent,
@@ -49,6 +49,13 @@
       if (!point) return null;
 
       const computed = computeJoystick(center, point, radius);
+
+      const magnitude = Math.hypot(computed.normalized.x, computed.normalized.y);
+      if (magnitude < JOYSTICK_DEADZONE) {
+        setKnobOffset({ x: 0, y: 0 });
+        return { x: 0, y: 0 };
+      }
+
       setKnobOffset(computed.knobOffset);
       return computed.normalized;
     },