Jazz SPOT Intro in Takadanobaba is a tiny basement bar about 2 minutes walk from the station. In addition to the long-running Saturday night jam sessions (which go till 5 in the morning), there are live jams now Tuesday - Thursday from whomever shows up. It's a very mellow place with no set line-up, the only regular being bar manager Inoue-san on alto sax. There's a real old-school 'jazz workshop' vibe to the Intro, with the musicians communicating freely while running through standards.
Inoue-san acts as bandleader and bartender, pumping out swinging solos and then running behind the bar to refresh your drink while the band vamps. Try to make it on a Saturday as Japanese and foreign jazz musicians often pop in to sit in with the band. The level of play ranges from amateur/students up to professionals who stop in after midnight. Be prepared to give up some personal space and get there early if you`re in a larger group.
There are about 1500 vinyl records and 1000 cds placed around the bar for nights when there's no live sets. I`ve heard everything from solo Keith Jarrett to the latest Japanese bossa-nova compilation there, so feel free to request anything. Intro is a unique place, and I have very fond memories of my weekly visits there during my student days.
Tokyo Jazz Joint photos of Intro can be seen here.
Station: Takadanobaba -JR Yamamote/Seibu-Shinjuku/Tozai Subway Lines
Exit: Waseda Exit
Distance from station: 2 minutes