Do you live in Japan, the US or somewhere else? I work in marketing strategy and we use in-home and other ethnography vendors all the time. I'd be interested in someone who can work in Japan/APAC, or even to have someone else to call here in the US.
I do provide remote services to a few startups in california but their audience is usually online and has ties to Japan.
I'm happy to listen to you. You can fill this form [0] out and I'll react out to you by the end of the week.