diff --git a/kokudo.js b/kokudo.js
index 4bc041b..7353efc 100644
--- a/kokudo.js
+++ b/kokudo.js
@@ -6,6 +6,13 @@
    '<a href="http://maps.gsi.go.jp/development/ichiran.html">国土地理院</a>'
 }).addTo(mymap);
 L.marker([38.96906230578634, 139.84348438550842]).addTo(mymap);
+// クリック位置にマーカーを追加
+/*
 mymap.on("click", (e) => {
   L.marker(e.latlng).addTo(mymap);
 });
+*/
+// クリック位置に円(20m)を追加
+mymap.on("click", (e) => {
+  L.circle(e.latlng,20).addTo(mymap);
+});