Graphhopper public server location

Hello. Im building a web app with routing as a core functionality and I want to use the hosted version of graphhopper. My problem is that the app is intended for Japan and so I was wondering where in the world are the Graphhopper instances to know how much latency is between my Japan hosted backend and the Graphhopper server.
Thanks!

Our servers are hosted in Germany. You can easily test out the latency from your location via pinging our API.