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 January 1934 |
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| San-es Shokai founded by Tadao Yoshida in Higashi Nihonbashi, Tokyo; production and marketing of fastening products begins. |
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| February 1938 |
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| San-es Shokai renamed Yoshida Kogyosho. |
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| February 1942 |
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| Yoshida Kogyosho reorganized as a limited company. |
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| May 1945 |
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| Komatsugawa Plant burned down and dissolved for a time. |
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| August 1945 |
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| Yoshida Kogyosho purchased Uozu Tekkousho K.K. and renamed Yoshida Kogyo K.K. |
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| January 1946 |
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YKK registered as a trademark of Yoshida Kogyo K.K. |
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| March 1951 |
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| Yoshida Kogyo K.K. relocates its headquarters to Nihonbashi Bakuro-cho, Chuo-ku, Tokyo. |
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| May 1955 |
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| Kurobe Plant commences operations in Kurobe City, Toyama Prefecture. |
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| August 1958 |
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| Headquarters relocated to Asakusa Kaminarimon, Taito-ku, Tokyo. |
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| November 1959 |
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| Yoshida Kogyo K.K. establishes its first overseas affiliate and begins production and marketing of fastening products in New Zealand. |
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| November 1961 |
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| Yoshida Kogyo K.K. begins production and marketing of aluminum building products. |
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| June 1963 |
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| Yoshida Kogyo K.K. relocates headquarters to its current location, Kanda Izumi-cho, Chiyoda-ku, Tokyo. |
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| April 1972 |
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| Shikoku Plant begins operations in Utazu-cho, Ayauta-gun, Kagawa Prefecture. |
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| June 1974 |
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| Tohoku Plant begins operations in Sanbongi-cho, Shida-gun, Miyagi Prefecture. |
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| February 1975 |
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| Kyushu Plant begins operations in Yatsushiro City, Kumamoto Prefecture. |
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| December 1981 |
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| Yoshida Kogyo K.K. introduces a new hook and loop fastener, Quicklon (also called Cosmolon). |
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| May 1984 |
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| Yoshida Kogyo K.K. celebrates its 50th anniversary. |
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| December 1984 |
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| Yoshida Kogyo K.K. launches real estate operations in Singapore. |
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| January 1985 |
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| Yoshida Kogyo K.K. launches agricultural operations in Brazil. |
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| September 1986 |
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| Yoshida Kogyo K.K. establishes its first overseas integrated plant in Indonesia; begins production of aluminum building products in Indonesia. |
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| August 1994 |
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| Yoshida Kogyo K.K. renamed YKK Corporation. |
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| September 1994 |
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| YKK Group establishes its Environmental Charter. |
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| January 1996 |
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| Policy Planning Committee toward China formed. |
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| September 1998 |
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| YKK opens its Global Business Center in Shinjuku, Tokyo. |
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| July 2000 |
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| YKK establishes YKK Newmax Co., Ltd. as a principal company for its snaps and button business operations. |
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| December 2002 |
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| YKK establishes its first machinery and engineering business company, the Suzhou YKK Machinery & Die Works Co., Ltd., in Suzhou, China. |
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| February 2003 |
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| YKK Fastening Products Sales Inc. established as a sales company for YKK's fastening business. |
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| April 2003 |
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| YKK Business Support Inc. founded as the shared services center for YKK Group. |
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| October 2003 |
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| YKK integrated its Architectural Products Manufacturing Group into YKK AP Inc. and begins the architectural products business of YKK Group as a complete organization. |
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