- Okamoto Machinery Co., Ltd.
- Address:2050 Kanami, Kanae-cho
- SIGMA GIKEN CO.,LTD
- Address:1611 Sekoizumi
- KYOUIKU GEAR MFG CO.,LTD.
- Address:14-9-13 Minamisakae-cho,
- KHK CO., LTD.
- Address:13-15, Nakamachi
- MEIWA KOSAKUSHO CO., LTD
- Address:14-12, 4-Chome
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