Sleep Walker are a Japanese jazz quartet featuring Masato Nakamura (sax), Hajime Yoshizawa (piano), Kiyoshi Ikeda (bass) and Tomokazu Sugimoto (bass), respectively, and Nobuaki Fujii (drums In 2000 the 12 inch vinyl Ai No Kawa / Ressurection In 2002). Their sound signature is identified with fat bass, heavy percussion, spiritual-jazz influenced saxophone and free piano improvisation. Sleep Walker released their debut album Sleep Walker from Especial records.

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