Tracklist
| 1 | Improvisation I |
| 2 | Improvisation II |
| 3 | Improvisation III |
| 4 | Improvisation IV |
Companies, etc.
- Recorded At – Pit Inn
- Distributed By – Clockwise
Credits
- Alto Saxophone, Tenor Saxophone, Bass Clarinet – Peter Brötzmann
- Artwork – Chiharu Yabuta
- Bass – Tamio Kawabata
- Drums – Ryojiro Furusawa
- Engineer [Assistant] – Osamu Nakamura
- Engineer [Recording] – Hidetoshi Mizue
- Flute [Nohkan, Dengakubue] – Yukihiro Isso
- Mastered By – Hiroshi Shiota
- Photography By – Eiji Kikuchi
- Typography [Calligraphy] – Okamoto Kohei
