Company History
| Month / Year | ASK Corp. | Asano Slate Co., Ltd. |
|---|---|---|
| December 1914 | The Asano slate plant is built in Fukagawa, Tokyo, becoming Japan’s first producer of asbestos slate. This construction marks the founding of Asano Slate Co., Ltd. | |
| October 1923 | Asano Slate merges with Asano Cement Co. becoming the Slate Department of that company. | |
| March 1924 | Asahi Slate Co., Ltd. is established in Kanagawa Ward, Yokohama, marking the foundation of Asahi Sekimen Kogyo Co., Ltd. | |
| March 1944 | Asahi Slate Co., Ltd. Yamanashi Plant is opened | |
| May 1949 | Asahi Slate lists its shares on the Tokyo Stock Exchange. | |
| December 1950 | Company name is changed to Asahi Sekimen Kogyo Co., Ltd. and head office moves to Chuo Ward, Tokyo. | |
| May 1951 | Asano Slate is spun off from Nihon Cement Co. (formerly Asano Cement Co.) establishing Asano Slate Co., Ltd. | |
| October 1951 | Company name changed to Asano Slate Co., Ltd. | |
| July 1960 | Asano Slate establishes Kanto Asano Pipe Co., Ltd. | |
| January 1962 | Asano Slate opens Osaka Plant. | |
| July 1962 | Asahi Sekimen Kogyo establishes Asahi Keisan Kogyo Co., Ltd. | |
| October 1962 | Asano Slate lists its shares on the Second Section of the Tokyo Stock Exchange. | |
| November 1975 | Asano Slate opens Ibaraki Plant. | |
| April 1987 | Asahi Sekimen Kogyo changes its name to ASK Corp. | |
| January 1989 | Head office moved to Tsurumi Ward, Yokohama | |
| November 1989 | ASK Corp. establishes Ask Sanshin Engineering Corp. Ltd. | |
| May 1991 | Yamanashi Plant is spun off into a separate company named Ask Technica Corporation. | |
| February 1999 | ASK Corp.’s AP Connector Department and Shiga Plant are certified under ISO 9002. | |
| December 1999 | Osaka Plant is certified under ISO 9002. | |
| October 2000 | ASK Corp. and Asano Slate merge to become A&A Material Corporation, establishing its head office to Minato Ward, Tokyo. | |
| February 2001 | Ibaraki Plant is certified under ISO 9002. | |
| June 2002 | A&AM moves its head office to Tsurumi Ward, Yokohama. | |
| March 2004 | Ibaraki Plant, and Osaka Plant are spun off as separate companies, respectively named A&A Ibaraki Co., Ltd. and A&A Osaka Co., Ltd. | |
| January 2005 | A&A Ibaraki and the Technology Development Center are certified under ISO 14001. | |
| February 2006 | A&A Osaka is certified under ISO 14001. | |
| February 2009 | The Company’s construction contracting business is spun off to establish A&A Construction Co., Ltd. | |
| October 2024 | Daishowa Uniboard Co., Ltd. becomes a subsidiary. | |
| February 2025 | Head office moved to Minato Ward, Tokyo A&A Construction Corporation changes its name to A&A Crest Corporation. Daishowa Uniboard Corporation changes its name to Uniboard Corporation. |
|