Yonezawa founded in the 1950's. Also known as Y, or Yone, Yonezawa was one of the biggest and certainly the most creative of all post war Japanese toy makers. Some were branded not as Yonezawa but as STS. It is unclear as to the origin of the STS label, but it is presumed to be that of an importer.
Yonezawa briefly dabbled in radio control in the mid-1980s with the introduction of the 1/10-scale Wave Hunter buggy, sold in North America as the Monogram Lightning.

It is unclear what has become of the company, but it is believed to be involved in the production of industrial electronics.
Yonezawa was a prodigious toy maker indeed, manufacturing thousands of different battery operated and mechanical toys in all categories from the early 1950's through the early 1970's.
Yonezawa Mr. Space Robot - 1961


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