B Flat is a premier jazz venue in Tokyo, hosting both local talent and international artists. There are regular live performances, often with two sets per night (around 7:00 pm and 8:30 pm). It has a spacious yet intimate underground setting with excellent acoustics. The club has built a reputation for high-quality music programming and a serious jazz atmosphere rather than a touristy bar vibe.

This basement jazz club with a cozy, intimate feel was renovated in 2023 with improved seating and a more refined ambiance. It is often described as a place where you can sit comfortably and focus on the music. Reservations are recommended, especially at weekends. Expect a cover charge (typically a few thousand yen depending on the show) 

B Flat is not just a bar - it’s a dedicated jazz listening space where music takes centre stage. If you’re in Tokyo and want an authentic live jazz experience with good food and a relaxed but refined setting, it’s one of the standout venues in the city.

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The B Flat Club can be found at 107-0052 Akasaka Sakae Building, B1F, 6-6-4 Akasaka, Minato-ku. Tokyo, Japan  
Tel: 03-5563-2563

Their website with details of upcoming shows and other information is here 

Here is a video: