| Company name | Sea & Sea Co., Ltd. |
| Location | 54-5 Ariya Aza Lettersawa, Kosaka-cho, Kakaku-gun, Akita 017-0204 |
| Telephone number | 0186-29-2976 |
| Fax number | 0186-29-3018 |
| Established. | December 21st, 2002 |
| Representative | Representative Director Toshiaki Asaishi |
| Officers | Executive Vice President Yukio Kiyoshi Fuji, Managing Director, Hiroaki Toki |
| Capital | 21 million yen |
| Number of employees | 43 men, 7 women, 50 in total |
| Description of business | Steel structure construction business, machinery and equipment installation construction business, construction work business, tobi and earthwork business, earth work and woodworking business, pipe work business, design work of incidental incidental to the same, radio wave darkroom construction |
| Approval of construction industry, etc. | Minister of Land, Infrastructure, Transport and Tourism Certification M Grade TFBM-193627 Class 1 Pressure Vessel Manufacturing Permit Autumn Arrival (-) No. 45 Akita Prefecture Bid Rating Machinery and Equipment Installation Work Class A Akita Prefecture Bid Rating Steel Structure Construction Class A Akita Prefecture Bid Rating Building Work Class B Civil Engineering, Architecture, Tobi Earthworks, Steel Structures, Electrical, Plumbing Works (Special-3) No. 81694 Machinery and Equipment Installation Work ( General-3) No. 81694 Registered as a Class 1 Architect Office Governor of Akita Prefecture No. 18-10A-0650 |
| Main business partners | Kosaka Smelting & Refining Co., Ltd., Akita Kogyo Co., Ltd., DOWA Techno-Enji Co., Ltd., Kawada Construction Co., Ltd., Hitachi Shipbuilding Co., Ltd., E&C Engineering Co., Ltd., Kawada Kogyo Co., Ltd., TDK Co., Ltd. Fuji Sassi Co., Ltd., Nippon Spindle Manufacturing Co., Ltd., Cottrell Industrial Co., Ltd., Shinko Environmental Solutions Co., Ltd., Riverlands Engineering Co., Ltd., Thanax Co., Ltd., Taiyo Nichiacid Co., Ltd., Tomoe Machinery Co., Ltd. Chichibu Sangyo Co., Ltd., Shinko Environmental Maintenance Co., Ltd., Kosakabashi Construction Co., Ltd., Yuatec Co., Ltd., Kakaku Regional Administrative Association, Kosaka Town, Kakaku Regional Promotion Bureau, Toshiba Energy Systems Co., Ltd., Kosaka Construction Co., Ltd., Takuma Co., Ltd., Mitsubishi Electric Corporation Kamakura Manufacturing Co., Ltd., Miquita Service Co., Ltd., Ebara Corporation |
History
| April 1, 1953 | Established Kiyoto Iron Works Co., Ltd. Kosaka Smelter construction and repair work |
| April 1, 1960 | Started operation as Tatagumi Iron works Division Co., Ltd. |
| July 23, 1993 | The Iron works division of Tawada-gumi Co., Ltd. and Seito Iron Works Co., Ltd. merged (the merger resulted in the organization of the Tadagumi Iron Works Division) |
| April 1, 1995 | Changed the company name from Tadagumi Co., Ltd. to Tanax Co., Ltd. |
| December 21st, 2002 | Established Sea & Sea Co., Ltd. |
| February 1st, 2003 | Transferred 20 employees and employees from Tanax Steel Co., Ltd. |
| January 31st, 2004 | Acquired all factory machinery and equipment from Tanax |
| February 11th, 2007 | Tokyo Branch Office established |
| February 1st, 2008 | Production system from the original plate by the introduction of plasma cutting machine equipment |
| February 1st, 2009 | Company name changed to Sea & Sea Co., Ltd. |
| November 2011 | Toshiba Co., Ltd. Quality Certification at Keihin Plant |
| April 17th, 2012 | Capital increased to 21 million yen. |
| June 13th, 2012 | The soil, construction, electric, tube, and steel construction business are specified in the construction industry. |
| November 2014 | Toshiba Co., Ltd. Updated Quality Certification at Keihin Plant |
| December 2017 | Introduction of 500t press |
| May 2018 | Heisei 30 Pedestrian First Model Office |
| December 2018 | Plasma cutting machine update (for thickness 50mm) |