A door into the most private corner of the Japanese underground. With its La Musica series, Black Editions turns to the catalogue of La Musica, the tiny imprint run by Asahito Nanjo - the bassist and ringleader behind High Rise, Mainliner, Musica Transonic, Toho Sara and more - on which he issued a stream of hand-assembled cassettes and CD-Rs, sold in microscopic editions at a handful of live dates and all but impossible to find ever since. This first instalment, Flight 1, gathers six of those lost transmissions, recorded between 1980 and 1998, remastered and pressed to vinyl for the first time. Taken together they map a parallel discography to Nanjo's better-known work, running from molten psychedelic rock to spectral song, post-punk and free improvisation.

Musica Transonic + Mainliner's Solid Static collects wild, heavy electric sessions from 1997, the classic lineup of Nanjo, Makoto Kawabata and Tatsuya Yoshida driving an abandoned Mainliner album into the moment-to-moment deconstructions of Musica Transonic. The propulsive title track opens on a bludgeoning motor-psych riff before veering off into open space, Kawabata's guitar coiling around Nanjo's buzzing bass and Yoshida's multi-limbed drumming.

Nanjo Asahito's M is a different creature entirely, a set of intimate songs traced out of the dark and recorded between 1980 and 1988. Far from the volume of his groups, it is the sound of the bandleader alone, previously buried in a mid-90s cassette micro-edition.

Rotting Telepathies' Rotting Tapes II, recorded in 1982, pairs Nanjo with the post-punk figure Michio Kadotani, once called the only real punk in Japan. An unrelenting rhythm section frames Kadotani's guitar and stream-of-babble vocals, here given its first full-length release beyond the original cassette.

Ohkami No Jikan (The Time of the Wolf) was among the more esoteric groups of the 1990s Tokyo underground, and Black Tape II, recorded in 1992, opens a facet of Nanjo's psychedelic cosmology distinct from his other work, until now confined to handmade cassettes and CD-Rs.

Nean's sole release, Doo Dah Nean, is the strangest of the set, an all-female trio - Yui on bass and electronics, Naoko on voice, Non on drums - crossing the sensual, dissociated phrasing of Japanese iroke kayōkyoku with shamanic rhythm and electronic rumble, its members drawn from Holy Angels, Ohkami No Jikan and Mauduit Nuit.

Finally, Bibiotheca Hermetica's One, recorded in 1996 and first issued on a cassette bearing no credits at all, closes the set as an anonymous, dead-of-night improvisation, its decentred free sound recalling the lineage of the Taj Mahal Travellers and East Bionic Symphonia.

Each title is a limited, remastered vinyl LP. Together they form La Musica Flight 1, the most complete look yet at a body of work that, until now, barely existed in physical form.