| 1886 |
Founded Kitagawa Mesh Factory (Shijonawate City, Osaka Prefecture) |
| 1940 |
Established Toyo Mesh Co., Ltd. |
| 1950 |
Developed and installed a multi-pole electric resistance welding mesh machine, and began production and sales of welded mesh. |
| 1963 |
Developed and installed a glass mesh welding machine, and began production and sales. |
| 1970 |
Expanded into Yusuhara District, Okayama Prefecture as China Toyo Mesh Co., Ltd. (now China Division). |
| 1972 |
Established Fukuoka Factory in Saza District, Fukuoka Prefecture. |
| 1974 |
Moved Fukuoka Factory to Iizuka Industrial Park and established Kyushu Toyo Mesh Co., Ltd. (now Kitakyushu Division). |
| 1979 |
Opened second headquarters factory in Ikoma City, Nara Prefecture (now Kansai Division Nara First Factory). |
| 1980 |
Transferred the technology department to Toyo Giken Industrial Co., Ltd., and established an independent and strengthened machine manufacturing division. Opened Central Factory in Gakuda Industrial Park, Aichi Prefecture. |
| 1984 |
Established Central Toyo Mesh Co., Ltd. as an independent entity from Central Factory (now Central Division Aichi First Factory & Aichi Second Factory). |
| 1985 |
Launched sales of welded closed-form shear reinforcement bars 'TSK Hoop'. |
| 1988 |
Opened Toyo Giken Industrial Co., Ltd. Miyazaki Factory in Miyazaki City, Miyazaki Prefecture. Developed and began production and sales of 'Exterior Fence Mesh Fence' and 'Multipurpose Construction Material C Panel'. |
| 1988 |
Opened Toyo Giken Industrial Co., Ltd. Miyazaki Factory in Miyazaki City, Miyazaki Prefecture. Developed and began production and sales of mesh fences for external fencing and multi-purpose construction material C panels. |
| 1990 |
Opened Kyushu Toyo Mesh Co., Ltd. Tsuchi Factory in Miyazaki City, Miyazaki Prefecture (now South Kyushu Division). |
| 1992 |
Merged China Toyo Mesh Co., Ltd., Kyushu Toyo Mesh Co., Ltd., Central Toyo Mesh Co., Ltd., and Toyo Giken Industrial Co., Ltd., and changed the company name to Tōami Co., Ltd. Restructured into China Business Headquarters, Kitakyushu Business Headquarters, South Kyushu Business Headquarters, Central Business Headquarters, and Giken Business Headquarters. |
| 1992 |
Merged China Toyo Kinnou Co., Ltd., Kyushu Toyo Kinnou Co., Ltd., Chubu Toyo Kinnou Co., Ltd., and Toyo Giken Industrial Co., Ltd., and changed the company name to Toami Co., Ltd. Reorganized each business headquarters. Commenced production and sales of the foundation rebar unit "Happy Base". |
| 1993 |
Opened China Business Headquarters Okayama Second Factory (now China Division Okayama Second Factory). |
| 1995 |
Listed on the Second Section of the Osaka Stock Exchange. |
| 1997 |
Acquired business from WSK Co., Ltd. in Imabari District, Chiba Prefecture, and established Kanto Business Headquarters and Chiba Factory. |
| 2000 |
Acquired adjacent land to Chiba Factory from Edogawa Steel Wire Co., Ltd. and expanded. Began production and sales of 'Inoshishikun' mesh for pest control fencing. |
| 2001 |
Reorganized the Business Headquarters into a Business Division. |
| 2002 |
Commenced production and sales of welded closed-form shear reinforcement bars, spiral hoop bars, and high-strength shear reinforcement bars "Riverbon 785". Acquired all shares of Sumikura Steel Co., Ltd. and made it a subsidiary. |
| 2002 |
Production and sales of welded closed-form shear reinforcement bars, spiral hoop bars, and high-strength shear reinforcement bar "Riverbon 785" have begun. All shares of Sumikura Steel Co., Ltd. were acquired and made a subsidiary. |
| 2005 |
Opened Aichi Third Factory in Okazaki City, Aichi Prefecture, as a dedicated shear reinforcement bar plant. |
| 2008 |
Integrated the Technical Research Division into the Southern Kyushu Division and established a new Research and Development Department. Opened Nara Second Factory in Ikoma City, Nara Prefecture, as a dedicated shear reinforcement bar plant. Sumikura Steel Co., Ltd. acquired the business from Sumikin Steel Co., Ltd. Okura Factory. |
| 2011 |
Commenced production and sales of high-strength shear reinforcement bar "Sumi Hoop". |
| 2012 |
Commenced production and sales of high-strength shear reinforcement bar "Power Ring 785". Obtained construction industry license (Nara Prefecture Governor's Permit No. 16229). |
| 2012 |
Production and sales of high-strength shear reinforcement bar "Power Ring 785" have begun. Construction industry license (Nara Prefecture Governor's Permit (General-24) No. 16229) obtained. |
| 2013 |
Listed on the Tokyo Stock Exchange Second Section following the merger of the Tokyo Stock Exchange and Osaka Stock Exchange. |
| 2015 |
Established SMC TOAMI Limited Liability Company in the Socialist Republic of Vietnam through a joint venture with Sankwa Kogyo Co., Ltd. and SMC Trading Investment JSC. |
| 2016 |
Commenced production and sales of high-strength shear reinforcement bar "GTS Hoop". Established and relocated a new SMC TOAMI LLC plant in Bà Rịa–Vũng Tàu Province, Vietnam. |
| 2016 |
Production and sales of high-strength shear reinforcement bar "GTS Hoop" have begun. Production and sales of high-strength shear reinforcement bar "Power Ring 685" have begun. A new factory of SMC TOAMI LLC was established and relocated in Bà Rịa–Vũng Tàu Province, Vietnam. |
| 2017 |
Transitioned from a company with a Board of Auditors to a company with an Audit and Other Committee. |
| 2019 |
Co-developed and launched the "Cross Spacer", a spacer for welded wire mesh installation. |
| 2019 |
Joint development and sales of welded wire mesh construction spacer "Cross Spacer" have begun. |
| 2020 |
Commenced production and sales of high-strength shear reinforcement bar "Arc Hoop 785". |
| 2020 |
Production and sales of high-strength shear reinforcement bar "Arc Hoop 785" have begun. |
| 2021 |
Acquired 50% of Watanabe Construction Co., Ltd., made it an equity-method affiliate, and entered the construction contracting business. Opened a Kitakyushu branch office in Kitakyushu City, Fukuoka Prefecture. |
| 2022 |
Acquired an additional 30% of Watanabe Construction Co., Ltd., making it a consolidated subsidiary. Built a new factory in Okazaki City, Aichi Prefecture, and opened it as the Aichi Factory of the Chubu Division. |
| 2022 |
An additional 30% of shares of Watanabe Construction Co., Ltd. were acquired, making it a consolidated subsidiary. The company moved to the Standard market due to a change in market classification by the Tokyo Stock Exchange. A new factory was built in Okazaki City, Aichi Prefecture, and opened as the Aichi factory of the Chubu Business Division. |
| 2023 |
Acquired 85.1% of FD Tech Kyushu Co., Ltd. (Miyawaka City, Fukuoka Prefecture) from Itochu Marubeni Sumisho Technos Steel Co., Ltd., made it a consolidated subsidiary, and changed the company name to FD Tech Co., Ltd. |
| 2023 |
Acquired 85.1% of shares of FD Tech Kyushu Co., Ltd. from Itochu Marubeni Sumisho Technos Steel Co., Ltd., making it a consolidated subsidiary, and changed the company name to FD Tech Co., Ltd. |
| 2024 |
Acquired 99% of Endeavor United Partners 18 Co., Ltd., consolidated Naka Junction Construction Co., Ltd. in Nakama City, Fukuoka Prefecture, and started operations with a three-block system covering the eastern, western, and Kyushu regions. |
| 2024 |
Acquired 99% of shares of Endeavor United Partners 18 Co., Ltd., and made Naka Junction Construction Co., Ltd. in Nakama City, Fukuoka Prefecture a consolidated subsidiary. Reorganized each office into a three-block system: East, West, and Kyushu. |
| 2025 |
Watanabe Construction Co., Ltd. opened a Kansai branch office in Shijōnawate City, Osaka Prefecture. Absorbed and merged Kitouchi Toys Co., Ltd. in Hamamatsu City, Shizuoka Prefecture, and designated it as the Ono Work Office. Established a production base in Shirai City, Chiba Prefecture. Consolidated Aird Co., Ltd. in Makinohara City, Shizuoka Prefecture. |
| 2025 |
Watanabe Construction opened a Kansai branch office in Shijonawate City, Osaka Prefecture. Acquired shares of Kitouchi Yūgu and absorbed them. Opened a Kanto factory in Shirai City, Chiba Prefecture. Consolidated Aird in Shizuoka Prefecture as a subsidiary and established the Kyushu Block Headquarters in Kitakyushu City, Fukuoka Prefecture. Established TOAMI VIETNAM LLC in Vietnam. |
| 2026 |
Acquired 99% of Arakiji Construction Co., Ltd. (Yokohama City, Kanagawa Prefecture) and made it a consolidated subsidiary. |
| 2026 |
Acquired 99% of shares of Arakiji Construction Co., Ltd. in Yokohama City, Kanagawa Prefecture, and made it a consolidated subsidiary. |
