Established Topy Industries by merging four Toto Group companies, including electric furnaces and wheel manufacturers.
Pursuing synergies through integrated production that manufactures and processes steel,
We have developed and supplied products that support daily life and industry.

Built a new factory in Ayase City, Kanagawa Prefecture
Expansion into passenger car, truck and bus wheel plants
- expansion
- Merger agreement signing ceremony
Wheel manufacturer Japan Motor Wheel Co., Ltd., electric furnace manufacturer Toto Steel Mfg., Co., Ltd., construction machinery parts manufacturer Toto Zoki Co., Ltd., and steel frame and bridge manufacturer Toto Tekko Co., Ltd. are merged to form Topy Industries, with each of them aiming to hold the top spot in their respective product fields. Named Topy Industries with enthusiasm

Expanding crude steel production during the period of rapid economic growth

Started industrial fastener business
Currently deployed in four countries, supplying products that make use of precision metal processing technologies to automobile manufacturers, etc.

Achieves integrated production from melting, casting, heat treatment, and processing
Improve productivity and quality
- expansion
- Unveiled at the 25th Tokyo Motor Show
Currently producing wheels with a diameter of 63 inches (approximately 3 tons in weight)
Over 90% global market share