diff --git a/map/gps/gps-chase.js b/map/gps/gps-chase.js
index 7cfab15..5513aa7 100644
--- a/map/gps/gps-chase.js
+++ b/map/gps/gps-chase.js
@@ -25,6 +25,9 @@
    var popup4 = L.popup({ maxWidth: 450 }).setContent(image4);
 	let d = L.marker([38.894329, 139.819570]).bindPopup(popup4).addTo(mymap);
 	d = L.latLng(38.894329, 139.819570);
+	
+	var gpsmarker = L.marker(mymap.getCenter()).addTo(mymap);
+    gpsmarker.bindPopup("STARTおしてね").openPopup();
 
     var nTrial = 100
     var watchId = null;		// 最初はnullにしておく