The story
Yonezawa Toys (米澤玩具（よねざわがんぐ）, Yonezawa Gangu) (known also as Yone or simply Y) was founded in the 1950s in Tokyo. It was one of Japan's largest and most prodigious post-war toy manufacturers and an early participant in the growing radio control market. It is a former subsidiary of Union Carbide as toy division.
The company focused on the production of thousands of different electrically operated and mechanical toys through the early 1970s. 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.
Under Sega's leadership, Yonezawa Toys was briefly known as Sega-Yonezawa until the Yonezawa branding was dropped entirely in April 1998. Once Sega Sammy Holdings was formed, Sega Toys was reorganized under Sega's entertainment contents business.
Since the early 2000s, Sega Toys markets itself distinctively from the Sega brand, with some occasional collaboration between the two. An example of their collaboration is Sega and Sega Toys producing the UFO Catcher prize games jointly, where Sega manufactures the arcade equipment, while Sega Toys produces the prizes.
In January 2024, Sega Sammy announced that it has resolved to transfer the Amusement Machine business of Sega to Sega Toys, while also changing the name of Sega Toys to Sega Fave Corporation which took effect by April of that year.
The model car line started with Taiseiya Company, which had been making 1:80 diecast cars called Micro Pet. The name was changed to Cherryca Phenix in 1962. In 1965, Taiseiya was bought by Yonezawa. Yonezawa used the name Diapet to cover these and its own range of 1:24 to 1:18 cars. In the 1990s, some 1:43 sets were issued as the Collection Club.
From Wikipedia’s article on Sega Fave, shared under CC BY-SA 4.0.4