Mexican restaurant in Japan?

Hello, I am a Mexican American. Currently my wife and I have been doing research in possibly relocating our family to Japan in the next few years. I was thinking about opening a Mexican restaurant but want to know what locals think of having the opportunity to eat Mexican food. We have been looking around Hiroshima and Okayama. Does anyone have any idea how a Mexican restaurant or Mexican food stand would do in these areas? I understand I wouldn’t get tourism numbers like in Osaka or Tokyo but I rather cater to the locals and we like the slower pace of life near the mountains on the east side of the island. I love the culture and want to assimilate without intruding. Thank you guys in advance.

by itzozaru