About Us

Greeting

Based on the 3S philosophy (Service, Speed, Superiority), Sekisui Chemical Group values the three satisfactions (S) of our customers (CS), partner companies (PS), and employees (ES).

Akira Imagawa
President and CEO
Sekisui Aqua Systems Co., Ltd.

Sekisui Aqua Systems will celebrate its 60th anniversary in 2024. All of our employees would like to express our sincere gratitude to our customers who have supported us up to now, and to the partner companies who have worked alongside us and supported us.

We started as an engineering company of the Sekisui Chemical Group in 1964. In 1967, we developed the first resin panel assembly tank in Japan, and built the foundation of our strength, which is the fusion of manufacturing and engineering. After that, we expanded our business area by integrating the water (aqua) business of the Sekisui Chemical Group, and evolved into a total solutions company in a wide range of fields, including the design and construction of factory plants and public infrastructure. With the motto of "innovation and creation centered on ESG management," we will further refine the technology and know-how we have cultivated for 60 years and strive to contribute to society by solving environmental and social issues. We hope for your continued patronage as "Aqua, trusted by customers."

Company Information

Organization Chart

Company name	Sekisui Aqua Systems Co., Ltd.
Head office	1-1-30 Oyodonaka, Kita-ku, Osaka 531-0076 (Umeda Sky Building Tower West, 21st floor)
Established	March 3, 1964
Capital	200 million yen
President	Akira Imagawa
Business	Construction of various industrial plants, construction of water environment facilities, construction of water utilization facilities, water supply and sewerage construction, water supply and drainage facility renovation, manufacturing, sales and construction of water tanks, etc. Manufacture, sales and construction of wastewater treatment equipment, manufacture, construction and export of energy-saving equipment
Sales	16.6 billion yen (fiscal year ending March 2025)
Number of employees	221 (fiscal year ending March 2025)
Construction business license	[Minister of Land, Infrastructure, Transport and Tourism License (Special-6) No. 104] 3862] Civil engineering, general construction, scaffolding and civil engineering, electrical work, pipe work, steel structure work, painting work, flood control work, machine and equipment installation work, waterworks, demolition work [Minister of Land, Infrastructure, Transport and Tourism Permit (General-6) No. 3862] Fire equipment work
Number of qualified personnel (As of March 31, 2024)	Engineer (industrial engineering department) 2 people (machine department) 1 person Assistant engineer 6 people First-class architect 1 person First-class civil engineering construction management engineer 32 people First-class architectural construction management engineer 23 people First-class electrical construction management engineer 7 people First-class pipe construction management engineer 65 people First-class construction machinery construction management engineer 1 person Energy management engineer (heat field) 4 people Fire equipment engineer 27 people

Company History

March 1964: The engineering division of Sekisui Chemical Co., Ltd. was separated and established as Seibu Eslon Construction Co., Ltd.

December 1964: Company name changed to Seibu Sekisui Construction Co., Ltd.

August 1966: Company name changed to Sekisui Engineering Co., Ltd.

January 1992: Company name changed to Sekisui Plant Systems Co., Ltd.

April 2003: Merged with Sekisui Environment Co., Ltd. and changed the company name to Sekisui Aqua Systems Co., Ltd.

April 2011: Sekisui Aquatech Co., Ltd. is absorbed into the company.

Office Guide

Head Office/Office

Head Office/Osaka Office

1-1-30 Oyodonaka, Kita-ku, Osaka 531-0076
(21st floor, Tower West, Umeda Sky Building)

9 minutes on foot from JR Osaka Station, Central North Exit
9 minutes on foot from Hankyu Umeda Station, Chayamachi Exit
9 minutes on foot from Subway Midosuji Line, Umeda Station, Exit 5

Plant & Infrastructure Division TEL 06-6440-2511 FAX 06-6440-2515
└Engineering Division TEL 06-6440-2505 FAX 06-6440-2515
Tank Systems Division
└Osaka Sales Office └Tank Sales Group TEL 06-6440-2525 FAX 06-6440-2527
└Renewal Sales Group TEL 06-6440-2524 FAX 06-6440-2527
└Overseas Sales Department TEL 06-6440-2508 FAX 06-6440-2518
Technology/CS Department TEL 06-6440-2502 FAX 06-6440-2510
Corporate Planning Department TEL 06-6440-2501 FAX 06-6440-2510
Business Management Department Accounting/System Department TEL 06-6440-2501 FAX 06-6440-2510
Business Management Department Human Resources/General Affairs Department TEL 06-6440-2500 FAX 06-6440-2510

Tokyo Office

4-7-5 Tsukiji, Chuo-ku, Tokyo 104-0045 (Tsukiji KY Building, 8th floor)

Hibiya Line Tsukiji Station, 2 minutes on foot
Asakusa Line Higashi-Ginza Station, 3 minutes on foot
Oedo Line Tsukiji Market Station, 4 minutes on foot
Yurakucho Line Shintomicho Station, 7 minutes on foot

Plant & Infrastructure Division TEL 03-5565-6515 FAX 03-5565-6518
└Engineering Division TEL 03-5565-6512 FAX 03-5565-6514
Tank Systems Division
└Tokyo Sales Office └Tank Sales Group TEL 03-5565-6520 FAX 03-5565-6521
└Renewal Sales Group TEL 03-5565-6522 FAX 03-5565-6523
Business Management Department Tokyo Management Group TEL 03-5565-6511 FAX 03-5565-7964
Business Management Department Human Resources/General Affairs Department TEL 06-6440-2500 FAX 06-6440-2510

Chubu Business Office

12th floor, Sumitomo Life Nagoya Building, 2-14-19 Meiekiminami, Nakamura-ku,
Nagoya 450-0003, Japan

JR Nagoya Station, Subway Nagoya Station (Higashiyama Line, Sakuradori Line)
Meitetsu Shin-Nagoya Station, Kintetsu Nagoya Station, about 10 minutes walk from each station

Tank Systems Division Chubu Sales Office TEL 052-582-7711 FAX 052-582-7714