Short-period immersion classes/tuition in Tokyo

[karavshin]

I live in Singapore. I travel to Japan about once a quarter, maybe twice a quarter, and usually can steal at least one full weekend there, sometimes two.

I have one coming up near the end of August.

I've just (re)started listening to the beginner season.

I was wondering if I could find a way for some "immersion" training for a weekend in Japan? I know that generally immersion programs are for a months or semesters or whatever, but I'd like to take advantage when i can. Do you know anyone who could offer me something like this?

I'm starting from a low level of japanese, but I don't think that should matter.

Thanks