If i do go to Japan (or decide to Live there) is there Catholic Churches within cities or in certain towns that i would be able to go to Mass and recieve the Sacraments?
Yes! I think there are more Catholic churches than any other Christian denomination in Japan... however, expect the church to be very small, the services to be modest and perhaps a German (just for an example) priest preaching to a (mostly) Filipino congregation (not an example).