Business partner
Business partner
| Eye LEC Giken | Arisawa Mfg. Co., Ltd. |
| Ube ekushimo | Okano Electric Wire |
| Okamoto formation | KB SEIREN Company. |
| Kuwabara electrical industry | kabushikikaishaseidensha |
| Shanghai Hitachi Cable Co., Ltd. | Sumitomo Electric Industries Ltd. |
| Ocean electric equipment | Tokyo Serorebel |
| Ocean electrical industry | TOTOKU ELECTRIC Co., Ltd. |
| Tonichi Kyosan Electric Wire Cable | Nissei Electric |
| NITTO DENKO Corporation | Nitto Shinko |
| NIHON KENSHI Co., Ltd. | Ninomiya electric wire industry |
| NIPPON RIKA KOGYOSHO Co., Ltd. | BANGKOK TELECOM CO.,LTD |
| Bando electric wire | Hitachi, Ltd. |
| Hitachi Metals Ltd. | Hitachi Chemical |
| Hitachi Transport System Ltd. East Japan | FUJI ELECTRIC systems |
| Fujikura Ltd. | Furukawa Electric Co., Ltd. |
| Fuji electric wire | Fujikura Fiber Optics Vietanam LTD. |
| MITSUI & CO., Ltd. | Mitsubishi Electric Corporation |
| MEIDENSHA Corporation | Light train chemical company |
| Yasukawa motor | |
-Honorific title abbreviation -
