var map = L.map("mymap").setView([35.685200, 139.7528], 15);

var gsiTile = L.tileLayer('https://cyberjapandata.gsi.go.jp/xyz/std/{z}/{x}/{y}.png', {
    attribution: "地理院タイル",
}).addTo(map); 

var osmTile = L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
    attribution: '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors',
});

var baseLayers = {"地理院地図": gsiTile,"OpenStreetMap": osmTile
};

L.control.layers(baseLayers).addTo(map);

L.control.scale().addTo(map);