TOHO Sheet & Frame Co., Ltd.

TOHO Sheet & Frame Co., Ltd. (東邦シートフレーム株式会社) is a Japanese manufacturer of metal and high-performance-material products headquartered in Nihonbashi, Chuo-ku, Tokyo. According to its corporate profile, the company was established on 30 March 1937 and began, as its president's message recounts, with the manufacture and sale of zinc-coated iron sheet (亜鉛鉄板), later expanding into metal-processed products such as steel drums, precoated steel sheet and metal siding. Its stated corporate purpose covers the manufacture, sale and processing of zinc-coated iron sheet, metal building materials and other metal products; the manufacture and sale of steel drums; the processing, sale and installation of resin products for vehicles; and the trading of building materials related to those lines. The company operates under the slogan "人へ 住まいへ 産業へ" (roughly, "for people, for homes, for industry") and describes itself as a maker that creates new value demanded by the times, with a philosophy of being "strict on quality, kind to people." Its product range spans several fields: precoated siding and exterior wall materials; colored corrugated sheet, lath sheet and roofing components; the Ail Roof (アイルーフ) insulated waterproofing system for steel-framed roofs and the Ai Deck Floor (アイデッキフロア) flat deck system for roofs and floors; shielding materials; steel drums and other logistics materials; special containers for pharmaceutical and semiconductor applications; polycarbonate safety windows; railcar interior equipment; and the Lexan Sheet line. It also lists products such as I.G.P. multi-layer unit windows and Clear Heat (クリアヒート) heat-generating polycarbonate board. Manufacturing is centered on the Yachiyo Works in Yachiyo City, Chiba Prefecture, which the company profile describes as having a factory site of 86,701 m² and factory buildings of 38,498 m². The profile lists production lines including a precoated coil line, two metal siding lines, two flat roof base material / flat deck lines, four cutting and slitter lines, an automated drum line, a special drum line, an I.G.P. window line and a Clear Heat line, along with testing equipment. The company reports 168 employees and capital of 350 million yen. It operates a head office / Tokyo office, the Yachiyo Works, a Kanto sales office with Niigata and Toyama sub-offices, and a Tohoku sales office in Sendai. Related companies named in the profile are Matsuki Shokai Co., Ltd. and T.T. Service Co., Ltd. In recent years the company says it has emphasized the development of eco-products using high-performance materials such as polycarbonate, which are increasingly adopted for railcars, ships and machine tools from an SDGs perspective. Its railcar interior equipment business is promoted internationally: the company announced that its High-Function Products Sales Department would exhibit at InnoTrans 2026, the Berlin rail technology trade fair. The company is led by President Yasutomo Suzuki (鈴木 康友).

TOHO Sheet & Frame Co., Ltd. was established on 30 March 1937, according to its corporate profile. In his message, the president states that the company began with the manufacture and sale of zinc-coated iron sheet (亜鉛鉄板) and subsequently expanded its business domain into metal-processed products such as steel drums, precoated steel sheet and metal siding. This progression from a single flat-steel product line into a portfolio of building materials, logistics containers and vehicle components forms the backbone of the company's history as it presents itself. Over the decades the company built out a manufacturing base centered on the Yachiyo Works in Yachiyo City, Chiba Prefecture. The corporate profile describes a factory site of 86,701 m² with 38,498 m² of factory buildings, and lists production equipment that reflects the breadth of the product range: a precoated coil line, two metal siding lines, two flat roof base material / flat deck lines, four cutting and slitter lines, an automated drum line, a special drum line, an I.G.P. window line and a Clear Heat line, supported by testing equipment including a color difference meter, a combined cycle tester, a digital microscope, a gloss meter, a salt spray tester, a water pressure tester, steel drum testing equipment, an X-ray fluorescence analyzer and a loading tester. The company's product development has moved from conventional metal processing toward high-performance materials. Its president notes that in recent years the company has focused on developing eco-products using high-performance materials such as polycarbonate, and that these are increasingly adopted for railcars, ships and machine tools from an SDGs perspective. Products such as the I.G.P. multi-layer unit window, Clear Heat heat-generating polycarbonate board, polycarbonate safety windows and railcar interior equipment represent this newer direction, alongside established lines such as Ail Roof, Ai Deck Floor, steel drums and special containers for pharmaceutical and semiconductor use. Organizationally, the company operates a head office and Tokyo office in Nihonbashi, Chuo-ku, Tokyo; the Yachiyo Works and Kanto sales office (with Niigata and Toyama sub-offices) in Yachiyo City, Chiba; and a Tohoku sales office in Sendai. Its corporate profile lists related companies Matsuki Shokai Co., Ltd. and T.T. Service Co., Ltd. The company reports capital of 350 million yen and 168 employees. It is led by Representative Director and President Yasutomo Suzuki, with Tatsuji Wakayama as Senior Managing Director, Masahiko Yoshino and Masayo Aikawa as Directors, and Soichiro Ouchi (standing) and Daisuke Ogura as Corporate Auditors. In the 2020s the company has continued to promote its high-function products internationally, announcing that its High-Function Products Sales Department will exhibit at InnoTrans 2026. Its stated philosophy — "strict on quality, kind to people" — and its slogan "for people, for homes, for industry" frame its ongoing positioning as a manufacturer creating new value demanded by the times.

• Company established, starting with the manufacture and sale of zinc-coated iron sheet.

• Business expanded into metal-processed products including steel drums, precoated steel sheet and metal siding.

• Yachiyo Works established in Yachiyo City, Chiba Prefecture, as the main manufacturing base.

• Announced that the High-Function Products Sales Department will exhibit at InnoTrans 2026.

A diversified Japanese metal-processing and high-performance-material manufacturer positioning itself as a maker that creates new value for people, homes and industry, with a philosophy of strict quality and human friendliness.

• PRECOAT (precoated steel sheet)

• Siding (exterior wall material)

• Colored corrugated sheet, lath sheet and roofing components

• Ail Roof (アイルーフ) insulated waterproof roofing system

• Ai Deck Floor (アイデッキフロア) flat deck

• Shielding materials

• Steel drums and other logistics materials

• Special containers for pharmaceutical and semiconductor use

• Polycarbonate safety windows

• Railcar interior equipment

• Lexan Sheet

• I.G.P. multi-layer unit windows

• Clear Heat heat-generating polycarbonate board

1. 1東邦シートフレーム株式会社 | 人へ 住まいへ 産業へtoho-sf.co.jp
2. 2代表挨拶toho-sf.co.jp
3. 3企業理念toho-sf.co.jp
4. 4会社概要toho-sf.co.jp
5. 5TOHO Sheet & Frame Co., Ltd. (Japan) - Wikidatawikidata.org