HI, I currently stay in other country,
and i just downloaded JAPAN TOPO MAP in to MICRO SDHC card , and i able to select japan topo map, but seems is doesn't display the map on my GARMIN NUVI1350 device, it's still display our own,country map, however we still find out that, using poi search able to find japan name and place and go in view the map using that ways only.

However, can i put many types of country map in one micro sd hc card? and if so after i rename the map, from GMAPSUPP.IMG to GMAPSUPP1.IMG , than it cannto load to device , due to wan include many types of map in the memory card for select them easily.