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August 1936: “OSAKA YOGYO FIRE BRICK CO..LTD.” established
September 1937: “Okayama Clay Plant”(the second branch of Yoshinaga Plant)built
January 1938: “Hinase Plant” built
December 1947: “Tokyo Branch Office” established
September 1949: Listed on the Osaka Stock Exchange
June 1951: “Mitsuishi Plant”(the third branch of Yoshinaga plant)established
April 1955: “Kyushu Branch Office” established
April 1962: “Yoshinaga plant”built
April 1985: “Technical Research Laboratory” established
June 1987: Changed company name to “YOTAI REFRACTORIES co”
October 1993: Merged with” OSAKA YOGYO CO.,LTD.”
July 2004: Joint venture enterprise “NEW YOTAI REFRACTORIES CO.,LTD.” established
May 2005: changed ” NEW YOTAI REFRACTORIES CO.,LTD.”to wholly owned enterprise
August 2011: The 75th anniversary
October 2021: LMM GROUP and NEW YOTAI reached a strategic, partnership，Establish YINGKOU LMM YOTAI REFRACTORIES CO.,LTD