In person lessons in Japan

Hi together!

I will be in Japan for a few weeks in May and would like to take private in-person lessons, if possible.

Subscribing to a language school for 2 weeks seems not the right thing – but maybe it is?

I am intermediate level and would like to speak as much as possible.

1. Is it possible to find someone easily?
2. Anyone with experience here?
3. What do you think about just joining a school..? Can I learn a lot in 2 weeks? (I'll be there 4 weeks in total, 2 weeks traveling and 2 weeks focused on language).

Thank you!