- TSUNEISHI HOLDINGS CORPORATION
- KAMBARA LOGISTICS Co., Ltd.
- KAMBARA TUG & MARINE SERVICES Co., Ltd.
- SHANGHAI KAMBARA KISEN (CHINA) SHIPPING Co., Ltd.
- SHANGHAI KAMBARA INTERNATIONAL FREIGHT TRANSPORTATION AGENCY Co., Ltd.
- DALIAN KAMBARA KISEN (CHINA) SHIPPING Co., Ltd.
- QINGDAO KAMBARA KISEN (CHINA) SHIPPING Co., Ltd.
- YAMASHITA SHIPPING AGENCY Co., Ltd.
- KAMBARA KISEN SINGAPORE Pte. Ltd.
- Union Marine Management Services Pte. Ltd.
- KMNL LODESTAR SHIPPING B.V.
- Tsuneishi Group Website