diff --git a/Sources/MapConductorForHERE/HereMapHost.swift b/Sources/MapConductorForHERE/HereMapHost.swift
index a790edd..1a8ee15 100644
--- a/Sources/MapConductorForHERE/HereMapHost.swift
+++ b/Sources/MapConductorForHERE/HereMapHost.swift
@@ -321,6 +321,17 @@ public final class HereMapHost: MapViewCoordinatorBase<HereMapViewState>, Marker
         applyStrategyRendering(nil)
     }
 
+    /// `clearOverlays()` から呼ばれる。strategy は接続したまま、描いたマーカーだけを消す。
+    /// 同じインスタンスの一覧が送られている間は描かず、顔ぶれが変わるか作り直された state が
+    /// 来たら描き直す（StrategyMarkerManager.clearMarkers・オーバーレイのコレクタと同じ）。
+    public func clearMarkers() async {
+        strategyClearedUntilListChanges = true
+        await strategyMarkerController?.clear()
+    }
+
+    /// ``clearMarkers()`` の後、一覧が変わるまで描かない印。
+    private var strategyClearedUntilListChanges = false
+
     public func beginContentPass() {
         strategyConnectedThisPass = false
     }
@@ -340,6 +351,7 @@ public final class HereMapHost: MapViewCoordinatorBase<HereMapViewState>, Marker
                 let renderer = HereMarkerRenderer(mapView: mapView)
                 strategyMarkerRenderer = renderer
                 strategyMarkerController = StrategyMarkerController(strategy: strategy, renderer: renderer)
+                strategyClearedUntilListChanges = false
                 // find() の android 同等 screen 空間判定用に geo→screen 投影を注入する。
                 strategyMarkerController?.markerProjector = { [weak self] geo in
                     guard let mapView = self?.mapView,
@@ -380,6 +392,10 @@ public final class HereMapHost: MapViewCoordinatorBase<HereMapViewState>, Marker
             newStatesById[state.id] = state
         }
         strategyMarkerStatesById = newStatesById
+        if strategyClearedUntilListChanges {
+            guard shouldSyncList else { return }
+            strategyClearedUntilListChanges = false
+        }
 
         for id in oldIds.subtracting(newIds) {
             strategyMarkerSubscriptions[id]?.cancel()
@@ -457,6 +473,8 @@ public final class HereMapHost: MapViewCoordinatorBase<HereMapViewState>, Marker
         await groundImageController?.clear()
         await circleController?.clear()
         await rasterLayerController?.clear()
+        // strategy（クラスタリングなど）が描いたマーカーも消す。
+        await state.serviceRegistry.clearMarkerRendering()
     }
 
     public func unbind() {