More high quality tile map?

I am searching for a tile map that could zoom into street level on Kibana. Unfortunately, default tile map is not enough.

Could someone share ones idea for good tile map service? My region is Japan.
Perhaps, has any one has achieved google map integration ?

I am using kibana rc-1.

Google map integration is unlikely, but the tile service is configurable in the kibana.yml file, and per visualization if you use a WMS server. You might also find this ticket interesting.

Thanks. I decided to use the one provided by www.openstreetmap.org

TMS server is the basic map in the Name row on below site.
http://wiki.openstreetmap.org/wiki/Tile_servers