Hey,
I'm not from Tokyo. I'm an artist, currently living in Berlin and that would be a great opp to visit Tokyo. I got time and I got a camera! If you'd book me a flight from Berlin or Brussels, I could join your director from the beginning. I don't need that much money (just need to buy a microphone that fits my DSLR), some good streetfood, spraycans,...So I might be cheaper than the others.
If you find that this idea sounds good, just get in contact with me. I'm also speaking French, and a bit Dutch, depends what you director's fav language is.
Best regards,
J.