Company Profile

Company Name	Step Science Co., Ltd.
Locations	Head Office 4-48-5 Mizue, Edogawa-ku, Tokyo 132-0011, Japan Tel: +81-3-5243-3620 Fax: +81-3-5243-3622 Tokyo Office 1-13-5 Mizue, Edogawa-ku, Tokyo 132-0011, Japan Tel: +81-3-6231-8922 Fax: +81-3-6231-8933 Kitakami Service Center 1-468-2 Sakuramachi, Hanamaki-shi, Iwate 025-0084, Japan Tel: +81-198-41-5888 Nagoya Service Center Room A, Grand Chariot NODA, 20-7 Yanagishita, Nodacho, Nakamura-ku, Nagoya-shi, Aichi 453-0858, Japan Tel: +81-52-414-5114
Capital	21,000,000　JPY
Established	December 14, 1984
President and CEO	Kohei Gunji
Employees	40 (as of July 2025)
Main Banks	Mitsubishi UFJ Bank, Koiwa Branch Sumitomo Mitsui Banking Corporation, Tokyo Chuo Branch
Fiscal Year-End	June
Main Products	Chilled Water Circulation Systems Large, medium, and small units; water-cooled, air-cooled, and special chillers Temperature-Controlled Water Circulation Systems (for semiconductor etchers/steppers) Low temperature / high temperature (compatible with Galden and Fluorinert) Polyurethane Vibration-Damping Materials (manufactured by Getzner) Cleanroom Equipment Clean benches, clean booths, clean storage cabinets, desiccators Laboratory and Stainless Steel Products Stainless steel workbenches, stainless steel carts, stainless steel components
Applications / Industries Served	Semiconductor manufacturing equipment (etchers, steppers, CVD systems) Medical devices and equipment (MRI, CT, PET) nalytical instruments (ICP-MS) Electron beam processing machines Laser equipment
Major Clients / Partners	Toshiba, Kioxia, Canon Medical Systems, Fujifilm Medical, Agilent Technologies, Canon Marketing Japan, Renesas Electronics, Sumitomo Heavy Industries, Ebara Corporation, Ono Sokki, Sony Semiconductor Manufacturing, Japan Semiconductor, Lapidus, RIKEN (The Institute of Physical and Chemical Research), The University of Tokyo, Tokyo Institute of Technology, Shibaura Institute of Technology, Osaka University
Affiliated Company	Step Engineering Co., Ltd. Head Office: 4-48-5 Mizue, Edogawa-ku, Tokyo 132-0011, Japan
Membership	Tokyo Refrigeration and Air Conditioning Equipment Association (General Incorporated Association)

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Address　
4-48-5 Mizue, Edogawa-ku, Tokyo 132-0011
Nearest station　
Toei Shinjuku Line Mizue Station (4 minutes walk)

Histroy

1984 Dec.: Established STEP SCIENCE CO., LTD.
Capital: 6 million JPY
Headquarters: 1-chome Nishikoiwa, Edogawa-ku, Tokyo
1985 Feb.: Started sales focusing on scientific equipment
1988: Head office moved to 2-13-10 Nishikoiwa, Edogawa-ku, Tokyo for business expansion.
Capital increased by 3 million JPY, totaling 12 million JPY.
Commenced sales of large and medium-sized cooling water circulation systems
1989: Established cooperative service companies nationwide for maintenance and inspection of cooling water circulation systems
Started sales of water recirculation chillers for MRI
1990: Capital increased by 3 million JPY, totaling 15 million JPY
1993: Capital increased by 3 million JPY, totaling 18 million JPY
Head office relocated to 1-26-5-305 Koiwa, Edogawa-ku, Tokyo for business expansion
1995: Started sales of temperature-controlled water circulation systems for semiconductor applications
1996: Opened Osugi Office at 4-9-21 Osugi, Edogawa-ku, Tokyo as a factory for modification and trial operation of cooling water circulation systems and vacuum equipment
2000: Capital increased by 3 million JPY, totaling 21 million JPY
Started sales of temperature-controlled water circulation systems for semiconductor and LCD applications
2002: Established Step Engineering, a service-related company
2003: Started sales of air-cooled chilled water systems for vehicles (for hospital use)
2004: Started sales of DC inverter chillers
2007: EMC testing passed for medical device chillers
2008 Aug.: Head office relocated to 4-48-5 Mizue, Edogawa-ku, Tokyo for business expansion
Osugi Office expanded its office at 4-12-7 Osugi, Edogawa-ku, Tokyo
2012: Opened Nagoya Service Center
2017: Cumulative deliveries of chillers for semiconductor manufacturing equipment reached 1,500 units
2018 Oct.: Released energy-saving type temperature-controlled water circulation chillers (-40°C) for semiconductor manufacturing equipment
2018 Nov.: Obtained ISO 9001:2015 certification for design, manufacturing, inspection, and maintenance of medical chillers
2020: Cumulative deliveries of chillers for semiconductor manufacturing equipment reached 2,000 units
2020 Nov.: Opened Kitakami Service Center
2022: Cumulative deliveries of chillers expected to reach 10,000 units
2023 May: Osugi Office relocated to 1-13-5 Mizue, Edogawa-ku, Tokyo for business expansion and renamed Tokyo Office
2024 Dec.: Celebrated 40th anniversary of the company
2026 May.: Jiro Gunji stepped down as President and CEO and assumed the position of Chairman of the Board.
Kohei Gunji was appointed President and CEO.

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