| 1881-12 |
Establishment of sulfuric acid bottle manufacturing company |
| 1881-12 |
January 1882, established "ACID PHIAL MANUFACTURING COMPANY". |
| 1881-12 |
ACID PHIAL MANUFACTURING COMPANY established. |
| 1887-12 |
Changed company name to Limited Liability Osaka Pottery Company |
| 1887-12 |
January 1888, changed company name to "OSAKA YOGYO Limited." |
| 1887-12 |
Changed company name to OSAKA YOGYO Limited. |
| 1894-01 |
Changed company name to Osaka Pottery Co., Ltd. |
| 1894-01 |
January 1894, changed company name to "OSAKA YOGYO CO., LTD." |
| 1894-01 |
Changed company name to OSAKA YOGYO CO., LTD. |
| 1907-01 |
Construction of Kaizuka Factory |
| 1907-01 |
January 1907, construction of "Kaizuka Plant" |
| 1907-08 |
Kaizuka Plant built. |
| 1936-08 |
Founded in Showa 11 (1936) with the aim of manufacturing high-grade firebricks, established with investments from Osaka Cement Co., Ltd. (now Sumitomo Osaka Cement Co., Ltd.) and others, and has since been engaged in manufacturing and sales of refractory materials for steel, non-ferrous metals, cement, glass, incinerators, and others. It has developed alongside core industries domestically and internationally, and continues to contribute as a comprehensive top manufacturer of refractory materials involved in 'heat and environment' projects. |
| 1936-08 |
August 1936, established "OSAKA YOGYO FIRE BRICK CO., LTD." |
| 1936-08 |
Established Osaka Ceramic Refractory Brick Co., Ltd. |
| 1936-08 |
Established OSAKA YOGYO FIRE BRICK CO., LTD. |
| 1937-09 |
Construction of Okayama Clay Factory (now Yoshinaga Factory Second Manufacturing Plant) |
| 1937-09 |
September 1937, constructed "Okayama Clay Plant" (currently Yoshinaga Factory Second Branch) |
| 1937-09 |
Built Okayama Clay Plant. |
| 1938-01 |
Construction of Hinase Factory |
| 1938-01 |
January 1938, constructed "Hinase Plant" |
| 1938-01 |
Constructed Hinase Factory. |
| 1938-01 |
Hinase Plant built. |
| 1947-12 |
Establishment of Tokyo Branch |
| 1947-12 |
December 1947, established "Tokyo Branch Office" |
| 1947-12 |
Opened Tokyo Branch. |
| 1947-12 |
Tokyo Branch Office established. |
| 1949-09 |
Listed on the Osaka Securities Exchange |
| 1949-09 |
September 1949, Tokyo Branch listed on Osaka Securities Exchange |
| 1949-09 |
Listed on the Osaka Stock Exchange. |
| 1951-06 |
Construction of Mitsuishi Factory (now Yoshinaga Factory Third Manufacturing Plant) |
| 1951-06 |
June 1951, constructed "Mitsuishi Plant" (currently Yoshinaga Factory Third Branch) |
| 1951-06 |
Mitsuishi Plant built. |
| 1955-04 |
Establishment of Kyushu Branch |
| 1955-04 |
April 1955, established "Kyushu Branch Office" |
| 1955-04 |
Opened Kyushu Branch. |
| 1955-04 |
Kyushu Branch Office established. |
| 1961-08 |
Construction of Mizunami Factory |
| 1961-08 |
August 1961, construction of "Mizunami Plant" |
| 1961-08 |
Mizunami Plant built. |
| 1962-04 |
Construction of Yoshinaga Factory |
| 1962-04 |
April 1962, construction of "Yoshinaga Plant". |
| 1962-04 |
Constructed Yoshinaga Factory. |
| 1962-04 |
Yoshinaga Plant built. |
| 1985-04 |
Establishment of Technical Research Institute |
| 1985-04 |
April 1985, establishment of "Technical Research Laboratory". |
| 1985-04 |
Opened Technical Research Institute. |
| 1985-04 |
Technical Research Laboratory established. |
| 1987-06 |
Company name changed to Youtai Corporation |
| 1987-06 |
June 1987, changed company name to "YOTAI REFRACTORIES CO., LTD.". |
| 1987-06 |
Changed company name to "Yotai Corporation". |
| 1987-06 |
Company name changed to YOTAI REFRACTORIES CO., LTD. |
| 1992-04 |
Relocation and new construction of New Materials Research Institute and Kaizuka Factory |
| 1992-04 |
April 1992, relocation of "Advanced Materials Laboratory" and "Kaizuka Plant" |
| 1992-04 |
Advanced Materials Laboratory and Kaizuka Plant relocated. |
| 1993-10 |
Merged with Osaka Kiln Industry Co., Ltd., inheriting New Material Research Institute, Nagoya Branch, Kaizuka Factory, and Mizunami Factory |
| 1993-10 |
October 1993, merged with "YOTAI REFRACTORIES CO., LTD." |
| 1993-10 |
October 1993, merged with "OSAKA YOGYO CO., LTD.". |
| 1993-10 |
Merged with Osaka Ceramic Co., Ltd., inheriting new material research institute, Nagoya Branch, Kaizuka Factory, and Mizunami Factory. |
| 1993-10 |
Merged with OSAKA YOGYO CO.,LTD. and its plants. |
| 1993-10 |
Merged with YOTAI REFRACTORIES CO., LTD. |
| 2004-07 |
Established a joint venture in China (Yingkou New Kiln Refractory Materials Co., Ltd.) |
| 2004-07 |
July 2004, established a joint venture in China, "YINGKOU NEW YOTAI REFRACTORY CO., LTD.". |
| 2004-07 |
Joint venture company YINGKOU NEW YOTAI REFRACTORY CO., LTD. established in China. |
| 2005-05 |
Made the China joint venture (Yingkou New Kiln Refractory Materials Co., Ltd.) a 100% subsidiary |
| 2005-05 |
May 2005, made the Chinese joint venture a 100% subsidiary. |
| 2005-05 |
Acquired 100% ownership of a joint venture company in China. |
| 2013-07 |
Listed on the Tokyo Stock Exchange following the integration of physical markets |
| 2013-07 |
July 2013, listed on the Tokyo Stock Exchange. |
| 2013-07 |
Listed on the Tokyo Stock Exchange along with the integration of spot markets. |
| 2021-08 |
Celebrated 85th anniversary |
| 2021-08 |
August 2021, celebrated the 85th anniversary of founding. |
| 2021-08 |
Celebrated the 85th Anniversary. |
| 2022-04 |
Moved to the Prime Market following the review of the Tokyo Stock Exchange market segments |
| 2022-04 |
April 2022, transitioned to the Prime Market due to market reorganization. |
| 2022-04 |
Shifted to the prime market due to the restructuring of the market classification of the Tokyo Stock Exchange. |
| 2022-10 |
Acquired refractory raw material manufacturing business from Shibata Kiln Industry Co., Ltd., and began operations at Mizunami Factory Toki Plant |
| 2022-10 |
October 2022, acquired the manufacturing business of Shibata Ceramic Raw Materials and began operations at the Hekinan Factory. |
| 2022-10 |
Acquired the refractory raw material manufacturing business of Shibata Ceramic Raw Materials Co., Ltd. and began operations as the Toki Factory of Mizunami Plant. |
