diff --git a/modules/expo-live-activity/android/src/main/java/expo/modules/liveactivity/TrainFollowNotificationBuilder.kt b/modules/expo-live-activity/android/src/main/java/expo/modules/liveactivity/TrainFollowNotificationBuilder.kt
index a4973bc..6b990cc 100644
--- a/modules/expo-live-activity/android/src/main/java/expo/modules/liveactivity/TrainFollowNotificationBuilder.kt
+++ b/modules/expo-live-activity/android/src/main/java/expo/modules/liveactivity/TrainFollowNotificationBuilder.kt
@@ -7,7 +7,6 @@ import android.graphics.Color
 import android.os.Build
 import androidx.annotation.RequiresApi
 import androidx.core.app.NotificationCompat
-import kotlin.math.roundToInt
 
 object TrainFollowNotificationBuilder {
     fun build(
@@ -102,10 +101,12 @@ object TrainFollowNotificationBuilder {
         val numSegments = total - 1
         val curIdx = currentIndex.coerceIn(0, total - 1)
 
-        // 各駅の位置を0～10000の範囲で計算（全駅等分）
-        val positions = (0 until total).map { i ->
-            if (numSegments == 0) 0
-            else (i * 10000.0 / numSegments).roundToInt().coerceIn(0, 10000)
+        if (numSegments == 0) {
+            return NotificationCompat.ProgressStyle()
+                .setProgressSegments(listOf(
+                    NotificationCompat.ProgressStyle.Segment(1).setColor(trainColor)
+                ))
+                .setProgress(1)
         }
 
         val dimColor = Color.argb(
@@ -115,31 +116,35 @@ object TrainFollowNotificationBuilder {
             Color.blue(trainColor)
         )
 
+        // 各セグメントの長さを均等に（合計 = numSegments * 100）
+        val segmentLength = 100
+        val progressMax = numSegments * segmentLength
+
         // セグメント: 通過済み=trainColor, 未通過=dimColor
         val segments = (0 until numSegments).map { i ->
-            val length = positions[i + 1] - positions[i]
             val segColor = if (i < curIdx) trainColor else dimColor
-            NotificationCompat.ProgressStyle.Segment(length).setColor(segColor)
+            NotificationCompat.ProgressStyle.Segment(segmentLength).setColor(segColor)
         }
 
-        // ポイント: 停車駅のみ表示（通過駅はポイントなし）
+        // ポイント位置: 駅 i → i * segmentLength (ただし最小値 1)
         val stopPoints = mutableListOf<NotificationCompat.ProgressStyle.Point>()
         stations.forEachIndexed { i, station ->
             if (station.isStop) {
+                val pos = (i * segmentLength).coerceIn(1, progressMax)
                 val ptColor = if (i <= curIdx) trainColor else dimColor
                 stopPoints.add(
-                    NotificationCompat.ProgressStyle.Point(positions[i]).setColor(ptColor)
+                    NotificationCompat.ProgressStyle.Point(pos).setColor(ptColor)
                 )
             }
         }
 
-        // 現在地 = 駅位置に対応する進捗値
-        val progressValue = positions[curIdx]
+        // 現在地の進捗値
+        val progressValue = (curIdx * segmentLength).coerceIn(0, progressMax)
 
         android.util.Log.d("ProgressStyle",
-            "total=$total stops=${stopPoints.size} curIdx=$curIdx progressValue=$progressValue " +
-            "stopPositions=${stopPoints.map { "?" }} " +
-            "stationNames=${stations.filter { it.isStop }.map { it.name }}"
+            "total=$total stops=${stopPoints.size} curIdx=$curIdx " +
+            "progressMax=$progressMax progressValue=$progressValue " +
+            "pointPositions=${stopPoints.joinToString(",") { "${it.position}" }}"
         )
 
         return NotificationCompat.ProgressStyle()
diff --git a/modules/expo-live-activity/src/index.ts b/modules/expo-live-activity/src/index.ts
index d6f1001..6309644 100644
--- a/modules/expo-live-activity/src/index.ts
+++ b/modules/expo-live-activity/src/index.ts
@@ -284,6 +284,11 @@ export async function updateTrainFollowActivity(
     const totalStations = state.allStations?.length ?? state.stationStops?.length ?? 0;
     const stopsJson = JSON.stringify(state.stationStops ?? []);
     const allStationsJson = JSON.stringify(state.allStations ?? []);
+    const stopCount = state.allStations?.filter(s => s.isStop).length ?? 0;
+    console.log(`[LiveActivity] update: currentIdx=${currentIdx} total=${totalStations} stops=${stopCount} allStations=${state.allStations?.length ?? 0} currentStation=${state.currentStation} nextStation=${state.nextStation}`);
+    if (state.allStations && state.allStations.length > 0) {
+      console.log(`[LiveActivity] first5=${JSON.stringify(state.allStations.slice(0, 5))} around_cur=${JSON.stringify(state.allStations.slice(Math.max(0, currentIdx - 1), currentIdx + 3))}`);
+    }
     await ExpoLiveActivityModule.updateTrainFollowNotification({
       title, body, color,
       progressCurrent: currentIdx,