Japanese manufacturer who sold a lot of track tubs for the popular keirin races in Japan. They were cheap and fairly true. There worst feature was the very hard treads which were not good in the dry but much worse than that in the wet!
They also produced cyclo cross tubs with tractor treads and standard road race models although it was the track ones the UK saw.
A mail order concern called "Sprint Tubs" based in the Wirral seemed to be the main seller- advertising in the back of Cycling through the 80's.