URL: http://joyfit.jp/azabujyuban/ (Japanese only, but there are photos of the facilities)
Location: 2-10-3 Azabujuban, Minato-ku, Tokyo (Google Maps)
Registration Fee: JPY 3,000 +sales tax (one-time fee)
Processing Fee: JPY 2,000 +sales tax (one-time fee)
Monthly Membership Fee: JPY 7,618 +sales tax
Notes: A simple gym with all the standard equipment provided. Some staff speak very basic English, but they recommended going in to register with a Japanese speaker.