var mymap = L.map("mymap").setView([35.684449, 139.752460], 14);
L.tileLayer('http://cyberjapandata.gsi.go.jp/xyz/std/{z}/{x}/{y}.png', {
attribution:
'© <a href="https://www.gsi.go.jp/">国土地理院</a> contributors'
}).addTo(mymap);
L.control.scale().addTo(mymap);
L.control.scale({position: topleft})