Honjo Kasei Co., Ltd.
- A plastics trading company dealing with thermoplastics and distributes material to the Asian market. Also deals in reprocessed and regrinded materials, and near prime or off grade materials.
- http://www.plastic.co.jp/

Daiwabo Co., Ltd.
- Manufactures and sells fabrics and garment materials, industrial materials and textiles, material for paper-making, and rubber sponges for industrial and sports use.
- http://www.daiwabo.co.jp/english/

Daido Steel Co., Ltd.
- Maker of steel, magnetic, and alloy materials, as well as some industrial equipment. Based in Nagoya.
- http://www.daido.co.jp/english/

Daiken Corporation
- Manufacturer of building construction lumber materials and parts for housing, commercial buildings, and public facilities.
- http://www.daiken.jp/english/

Mitsubishi Materials Corp.
- Active in nonferrous refining and materials, cement, fabricated metal products, aluminum, advanced materials, environmental business, semiconductors, and mobile systems.
- http://www.mmc.co.jp/