Sadistic Mika Band wasn't really characterized as a Prog-Rock band. They came about at a time Glam was starting to take off in 1972 and had the distinction of having their second and third albums produced by Chris Thomas (whom Mika wound up having an affair with and later marrying) and released in the UK, to good reviews and a decent following.

They toured as opening act for Roxy Music in October 1975 (where this concert comes from) to coincide with the release of their 3rd album "Hot Menu" and did several appearances on British television.

As usual, they were never issued by a label in the U.S. and had only the hardcore import collectors here for a following. Naturally, they never performed live in the U.S. even though there was a lot of press about them and a goodly amount of hype, which in turn made it possible for a number of other Japanese bands to explore popularity outside their own country during the middle and late 70's.

It's highly likely that the popularity in Europe for bands like Sadistic Mika made it possible for bands like Yellow Magic Orchestra (which morphed from ex-Mika Band members) and Ryuichi Sakamoto to establish themselves to English speaking audiences. Just as it was possible performers like Stomu Yamash'ta made it possible for bands like Sadistic Mika to be considered for release in the UK. Just speculating.

Vocals are a bit weak and not their strong suit. But the bulk of the tracks during this concert are instrumental, which are top notch and confirms the idea a lot of great musicians were not confined to a couple of countries.

After the affair surfaced, Mika and Kazuhiko Kato, the bands lead guitarist and estranged husband, divorced and left the band. Mika becoming Mrs. Thomas, Kazuhiko pursuing a solo career before becoming a TV personality, while the rest of the group continued for a time as simply The Sadistics.

Just a reminder that music is the universal language and its spoken everywhere and you don't necessarily have to understand it to get into it.