Today it's rainning in Tokyo.
When it rains, we would recommend to do some indoor activities as one of the options. Kumegawa Bowl is entertainment place with bowling, batting center, futsal, pool table, table tennis, etc in Tokyo Higashimurayama city.
It's open for 24 hours on Fridays, Saturdays, and the day before national public holidays so you would be able to enjoy if you are under jet lag as well !