History
A&A Material Corporation was born in October 2000 with the merger of ASK Corp. and Asano Slate Co., Ltd.
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.
February 1915   Asano Slate Co., Ltd. is established. The Asano slate plant is renamed Tokyo Plant.
August 1918   Asano Slate opens Moji Plant.
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.  
October 1924 Asahi Slate opens Yokohama Plant.  
February 1927 Asahi Slate moves its head office to Tsurumi Ward, Yokohama.  
1928 Sekimen Boshoku Co., Ltd. is established.  
April 1930   Asano Slate opens Nagoya Plant.
1933 Sekimen Boshoku changes its name to Asahi Sekimen Boshoku Co., Ltd.  
July 1939   Asano Slate opens Sapporo Plant.
1942 Asahi Sekimen Boshoku changes its name to (former) Asahi Sekimen Kogyo Co., Ltd.  
May 1949 Asahi Slate lists its shares on the Tokyo Stock Exchange.  
December 1950 Asahi Slate Co., Ltd. merges with Asahi building and (former) Asahi Sekimen Kogyo Co., Ltd., adding its automobile-related operations, including friction materials and sealants at its Yamanashi Plant, to the latter company’s operations. The company is reborn as Asahi Sekimen Kogyo Co., Ltd. and moves its head office to Chuo Ward, Tokyo.  
May 1951   Asano Slate is spun off from Nihon Cement CO. establishing Asano Slate Co., Ltd.
October 1951   Asano Slate Co., Ltd. merges with Higashi-nippon Slate Kogyo Co., Ltd., Osaka Slate Kogyo Co., Ltd. and Kyushu Slate Co., Ltd. to form Asano Slate Co., Ltd.
July 1960   Asano Slate establishes Kanto Asano Pipe Co., Ltd.
June 1961 Asahi Sekimen Kogyo Co., Ltd. opens Mizushima Plant.  
July 1961   Asano Slate establishes Shikoku Asano Slate 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.
July 1969   Asano Slate establishes Asano Flame Retardant Building materials Co., Ltd.
April 1970 Asahi Sekimen Kogyo opens Aichi Plant.  
April 1971   Asano Slate opens Hiroshima Plant.
November 1974 Asahi Sekimen Kogyo opens Ishioka Plant.  
November 1975   Asano Slate opens Ibaraki Plant.
June 1976   Asano Slate establishes Tohoku Asano Slate Co., Ltd.
April 1987 Asahi Sekimen Kogyo changes its name to ASK Corp. and moves its head office to Tsurumi Ward, Yokohama.  
November 1989 ASK Corp. establishes Ask Sanshin Engineering Corp. Ltd.  
October 1991 Yamanashi Plant is spun off into a separate company named Ask Technica Corporation.  
January 1997   Hiroshima Plant is spun off into a separate company named Chugoku Asano Pipe Co., Ltd.
February 1999 ASK Corp.’s AP Connector Department and Shiga Plant are certified under ISO 9002.  
June 1999 Aichi Plant is 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 and Nagoya Plant are certified under ISO 9002.
June 2002 A&AM moves its head office to Tsurumi Ward, Yokohama.
March 2004 Ibaraki Plant, Aichi Plant and Osaka Plant are spun off as separate companies, respectively named A&A Ibaraki Co., Ltd., A&A Aichi Co., Ltd. and A&A Osaka Co., Ltd.
October 2004 Nagoya Plant is spun off into a separate company named A&A Nagoya Co., Ltd.
January 2005 A&A Ibaraki and the Technology Development Center are certified under ISO 14001.
November 2005 The Technology Development Center is integrated and newly established in Chikusei, Ibaraki Prefecture.
February 2006 A&A Osaka is certified under ISO 14001.
October 2006 A&A Aichi is certified under ISO 14001.
February 2009 The Company’s construction contracting business is spun off to establish A&A Construction Co., Ltd.

※ISO standards are revised, ISO 9002 became migrated to ISO 9001