diff --git a/examples/companion_radio/MyMesh.h b/examples/companion_radio/MyMesh.h
index 3b02f5f6..cb733267 100644
--- a/examples/companion_radio/MyMesh.h
+++ b/examples/companion_radio/MyMesh.h
@@ -150,6 +150,10 @@ protected:
 
   uint32_t calcFloodTimeoutMillisFor(uint32_t pkt_airtime_millis) const override;
   uint32_t calcDirectTimeoutMillisFor(uint32_t pkt_airtime_millis, uint8_t path_len) const override;
+  uint32_t getCADFailMaxDuration() const override {
+    if (_radio->isJapanMode()) return UINT32_MAX;  // JP LBT: no forced TX — channel must be free per ARIB STD-T108
+    return Dispatcher::getCADFailMaxDuration();
+  }
   void onSendTimeout() override;
 
   // DataStoreHost methods
diff --git a/examples/simple_repeater/MyMesh.h b/examples/simple_repeater/MyMesh.h
index 88729ea7..98a71153 100644
--- a/examples/simple_repeater/MyMesh.h
+++ b/examples/simple_repeater/MyMesh.h
@@ -142,6 +142,10 @@ protected:
   void logTx(mesh::Packet* pkt, int len) override;
   void logTxFail(mesh::Packet* pkt, int len) override;
   int calcRxDelay(float score, uint32_t air_time) const override;
+  uint32_t getCADFailMaxDuration() const override {
+    if (_radio->isJapanMode()) return UINT32_MAX;  // JP LBT: no forced TX — channel must be free per ARIB STD-T108
+    return Dispatcher::getCADFailMaxDuration();
+  }
 
   uint32_t getRetransmitDelay(const mesh::Packet* packet) override;
   uint32_t getDirectRetransmitDelay(const mesh::Packet* packet) override;
diff --git a/examples/simple_room_server/MyMesh.h b/examples/simple_room_server/MyMesh.h
index e888bfa5..131e3566 100644
--- a/examples/simple_room_server/MyMesh.h
+++ b/examples/simple_room_server/MyMesh.h
@@ -130,6 +130,11 @@ protected:
   void logTxFail(mesh::Packet* pkt, int len) override;
 
   int calcRxDelay(float score, uint32_t air_time) const override;
+  uint32_t getCADFailMaxDuration() const override {
+    if (_radio->isJapanMode()) return UINT32_MAX;  // JP LBT: no forced TX — channel must be free per ARIB STD-T108
+    return Dispatcher::getCADFailMaxDuration();
+  }
+
   const char* getLogDateTime() override;
   uint32_t getRetransmitDelay(const mesh::Packet* packet) override;
   uint32_t getDirectRetransmitDelay(const mesh::Packet* packet) override;
diff --git a/examples/simple_sensor/SensorMesh.h b/examples/simple_sensor/SensorMesh.h
index bb786b2a..7a1b8b1b 100644
--- a/examples/simple_sensor/SensorMesh.h
+++ b/examples/simple_sensor/SensorMesh.h
@@ -116,6 +116,10 @@ protected:
   float getAirtimeBudgetFactor() const override;
   bool allowPacketForward(const mesh::Packet* packet) override;
   int calcRxDelay(float score, uint32_t air_time) const override;
+  uint32_t getCADFailMaxDuration() const override {
+    if (_radio->isJapanMode()) return UINT32_MAX;  // JP LBT: no forced TX — channel must be free per ARIB STD-T108
+    return Dispatcher::getCADFailMaxDuration();
+  }
   uint32_t getRetransmitDelay(const mesh::Packet* packet) override;
   uint32_t getDirectRetransmitDelay(const mesh::Packet* packet) override;
   int getInterferenceThreshold() const override;
diff --git a/src/Dispatcher.h b/src/Dispatcher.h
index d32633f1..5c362c2d 100644
--- a/src/Dispatcher.h
+++ b/src/Dispatcher.h
@@ -40,6 +40,7 @@ public:
 
   virtual int getMaxTextLen() const { return 10 * 16; }  // default: non-JP
   virtual int getMaxGroupTextLen() const { return 10 * 16; }  // default: non-JP
+  virtual bool isJapanMode() const { return false; }  // default: non-JP
 
   /**
    * \brief  starts the raw packet send. (no wait)