diff --git a/loc-chase2.html b/loc-chase2.html
index efd1899..d311774 100644
--- a/loc-chase2.html
+++ b/loc-chase2.html
@@ -15,12 +15,111 @@
   ></script>
 
   <!-- 自分のJS -->
-  <script src="loc-chase.js" defer></script>
+  <script defer>
+    document.addEventListener("DOMContentLoaded", () => {
+      var mymap = L.map("locationmap").setView([38.891, 139.824], 16);
+
+      L.tileLayer("https://{s}.tile.osm.org/{z}/{x}/{y}.png", {
+        attribution:
+          '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
+      }).addTo(mymap);
+
+      var locmarker = L.marker(mymap.getCenter()).addTo(mymap);
+      locmarker.bindPopup("STARTおしてね").openPopup();
+
+      var nTrial = 100;
+      var watchId = null;
+
+      function stopLOC() {
+        if (watchId != null) {
+          navigator.geolocation.clearWatch(watchId);
+          document.getElementById("title").textContent = "stop";
+          locmarker.setPopupContent("停めました");
+        }
+        watchId = null;
+      }
+
+      function tryWatchLOC() {
+        stopLOC();
+        watchId = navigator.geolocation.watchPosition(
+          onSuccess,
+          onError,
+          { maximumAge: 0, timeout: 3000, enableHighAccuracy: true }
+        );
+        document.getElementById("title").textContent = "START!!";
+      }
+
+      // 共通処理
+      function updateLocation(latlng) {
+        mymap.panTo(latlng);
+
+        const goalLat = 38.892;
+        const goalLng = 139.825;
+
+        const dLat = Math.abs(latlng.lat - goalLat);
+        const dLng = Math.abs(latlng.lng - goalLng);
+
+        let message;
+
+        if (dLat < 0.0003 && dLng < 0.0003) {
+          message = "🎉 GOAL!! 宝を見つけました！";
+        } else if (dLat < 0.001 && dLng < 0.001) {
+          message = "おしい！もう少し！";
+        } else {
+          message = "探索中…";
+        }
+
+        locmarker
+          .setLatLng(latlng)
+          .setPopupContent(message)
+          .openPopup();
+      }
+
+      // GPS 成功時
+      function onSuccess(pos) {
+        var latlng = L.latLng(
+          pos.coords.latitude,
+          pos.coords.longitude
+        );
+        updateLocation(latlng);
+      }
+
+      function onError(err) {
+        var restN = "あと" + (--nTrial) + "回試行します。";
+        locmarker.setPopupContent("捕捉失敗:" + restN).openPopup();
+        if (nTrial <= 0) {
+          navigator.geolocation.clearWatch(watchId);
+        }
+      }
+
+      // 地図クリック対応
+      mymap.on("click", function (e) {
+        console.log("クリック:", e.latlng);
+        stopLOC();
+        updateLocation(e.latlng);
+      });
+
+      // スマホタップ対応
+      mymap.on("tap", function (e) {
+        console.log("タップ:", e.latlng);
+        stopLOC();
+        updateLocation(e.latlng);
+      });
+
+      // ボタン設定
+      document.getElementById("start")
+        .addEventListener("click", tryWatchLOC);
+
+      document.getElementById("stop")
+        .addEventListener("click", stopLOC);
+
+    }, false);
+  </script>
 
   <style>
     #locationmap {
       width: 90vw;
-      height: 75vw;
+      height: 400px; /* ←固定値に変更 */
       margin: auto;
     }
   </style>
@@ -32,7 +131,6 @@
   <p>
     <button id="start" type="button">START</button>
     <button id="stop" type="button">STOP</button>
-    <a href="loc-chase2.js">src</a>
   </p>
 
   <div id="locationmap"></div>