Around ten or 12 years ago, at the dawn of the 21st century, a whole rash of previously obscure, out-of-print jazz albums were given the full CD reissue treatment in Japan. At the time, these were generally unavailable here – unless as expensive imports – and now those CD reissues themselves are long deleted and almost as hard to get hold of as the original vinyl. This gnarly nugget is a classic example, and carries the extra distinction of being by one of the most compelling Japanese bands of the 1970s – an outfit that remains criminally under-appreciated in the West. It's a live recording that throws together joyful, Age of Aquarius-style jazz-rock similar to Keith Tippett's Centipede; low-down, electric Miles-style funk; turbulent free jazz; and blazing, up-tempo post-bop. The musicianship is of staggeringly high quality and the whole project bursts with ambitious confidence. Just don'texpect to find it in the shops, again.

Vinyl sold in 2009 for $37 at ebay.com