| 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 |
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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 |
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Company name changed to Asano Slate Co., Ltd. |
| July 1960 |
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Asano Slate establishes Kanto Asano Pipe Co., Ltd. |
| January 1962 |
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Asano Slate opens Osaka Plant. |
| July 1962 |
Asahi Sekimen Kogyo establishes Asahi Keisan Kogyo Co., Ltd. |
|
| October 1962 |
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Asano Slate lists its shares on the Second Section of the Tokyo Stock Exchange. |
| November 1975 |
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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. |
