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| Company Name | Address |
| Ikeda Gear Mfg Co., Ltd. | 12-4-45 Hassami13jyo, Nishi-ku, Sapporo-shi, Hokkaido +81-11-661-8171 kk.ikeda@h7.dion.ne.jp |
| Isogami Gear Manufacturing Co., Ltd. | 4-1-5 Sannou, Ota-ku, Tokyo +81-44-280-2835 |
| Itoh Gear Works Ltd. | 3-23-12, Isonokami-cho, Kishiwada-shi, Osaka +81-724-36-0360 |
| INASAKA GEAR MANUFACTURING CO., LTD. | 681 Takaoka, Katou-shi, Hyogo +81-795-48-2450 http://www.inasaka.com |
| IWASA TECH | 4-12-40 Shinkiba, Kotou-ku, Tokyo +81-3-3521-0103 http://www32.ocn.ne.jp/~iwasatech0103/index.html |
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| KASHIFUJI WORKS, LTD. | 28 Kamota, Kamitoba, Minami-ku, Kyoto-shi, Kyoto +81-75-691-9171 http://www.kashifuji.co.jp |
| Kawaguchi Engineering Co., Ltd. | 2150 Kusanagi, Shimizu-shi, Shizuoka +81-543-45-2888 http://www.kawaguchi-kikai.co.jp |
| Kawasaki Heavy Industries, Ltd. Consumer products Machinery Group | 1-1 Kawasaki-cho, Akashi-shi, Hyogo +81-78-921-1489 http://www.khi.co.jp/ |
| Kawashima Gear Manufacturing Co. | 1810-1 Nogisaki, Moriya-shi, Ibaragi +81-297-48-6199 |
| KANZAKI KOKYUKOKI MFG. CO., LTD. | 2-18-1 Inadera, Amagasaki-shi, Hyogo +81-6-6491-1111 http://www.kanzaki.co.jp |
| Kikuchi gear Co., Ltd. | 726-30 Hukutomisinmachi, Ashikaga-shi, Tochigi +81-284-71-4315 http://www.kikuchigear.co.jp |
| KYOUIKU GEAR MFG, CO., LTD. | 1-8-3 Higasiueno, Taitou-ku, Tokyo +81-3-3831-8238 http://www.kggear.co.jp/ |
| Kyowa Manufacturing Co., Ltd. | 69-1 Hurusaka, Hojyo-cho, Kasai-shi, Hyogo +81-790-42-5111 http://www.kyowa-mfg.co.jp |
| Kyowa Haguruma Seisakusyo Co., Ltd. | 2-8-6 Edobukuro, Kawaguchi-shi, Saitama +81-482-84-4311 |
| Kusaka Gear Manufacturing Company | 178 Komatubara, Hanazono-cho, Toyota-shi, Aichi +81-565-52-3911 http://www.kusaka-gear.co.jp |
| Kurisaki Gear Mfg. Co., Ltd. | 2-27-16 Nakaikegami, Ota-ku, Tokyo +81-3-3753-1624 |
| Kobe Gears Works Ltd. | 10-5 Minamihutami, Hutami-cho, Akashi-shi, Hyogo +81-78-943-4811 |
| Koritsu Co., Ltd. | 1-15-20 Morikawachihigashi, Higashiosaka-shi, Osaka +81-6-6783-6777 |
| Kohara gear Industry Co., Ltd. | 13-17 Naka-machi, Kawaguchi-shi, Saitama +81-48-255-4871 http://www.khkgears.co.jp |
| Komori Machinery Co., Ltd. | 300 Hukuzawa, Takahata-machi, Higashiokutama-gun, Yamagata +81-238-57-5111 |
| Klingelnberg (Japan) Ltd. | 1-13-12 Shinyokohama, Kohoku-ku, Yokohama-shi, Kanagawa Klingelnberg Building 7F +81-45-473-6061 |
| Komatsu Ltd. | 2-3-6, Akasaka, Minato-ku, Tokyo +81-3-5561-2752 http://www.komatsu.co.jp |