OP, I would go to LBS and check out some bikes. If you hurry, you might be able to still buy some Fumikiri bikes. Cheapo SS bike. Prolly you can have it fixed easy.

You might get a translator to help you out with LBS people, too. Most Japanese can't speak English (even if they "know" English). And, this almost always leads to a serious misunderstanding; to make it worse, a lot of em is "terrified" about interacting in any foreign language. Being able to communicate in Japanese (via translator) should improve your situation considerably because there is less for LBS people to "terrified" about. ...

... But then getting a translator is a pain in an arse. Don't you have friends at work who could come with you? If not, PM me. I may be able to help out.