Nihon KOSO Co.,Ltd., a full-line supplier of Automation System. Control valves, actuators, positioners, to pressure switches, chemical pumps, control systems, etc.

Introduction of diversified KOSO control valves that contribute to process automation in various fields of industry

Introduction of actuators for KOSO control valves for broad applications including pneumatic valves, hydraulic valves and motor-operated valves

Introduction of accessories that further enhance attractiveness of KOSO products

Introduction of MAC pumps produced by KOSO, pioneer of chemical non-seal pumps, providing reliability and achievements

Introduction of various sensors and switches made by SOR and others

2024.08.09 Summer holiday: Due to the Summer holiday season, we Nihon KOSO Co., Ltd. & Tokyo KOSO Co., Ltd. will close from Aug. 10th, 2024 to Aug. 15th, 2024.
We will operate from Aug. 16th.
2023.12.28: Nihon KOSO acquires the Valve Actuator Business of Paladon Systems S.r.l., Italy
2020.12.28 New Year’s holiday: Due to the New Year's holiday season, we Nihon KOSO Co., Ltd. & Tokyo KOSO Co., Ltd. will close from Dec. 30th, 2020 to Jan. 3th, 2021.
We will operate from Jan. 4th.
2018.05.23: Nihon KOSO acquires the Control Valve Business of Parcol S.p.A., Italy
2018.05.01: Announcement relating to discontinuance of certain products manufactured and sold by Tokyo Okazaki Industry Co., Ltd.
2017.03.09: New SMART POSITIONER(KGP5000) was released on 10th January 2017.