1947Iwai Chemicals Company Ltd. is established in Nihonbashi-honcho, Chuo City, Tokyo
1948 Iwamotocho Factory and Warehouse are established in Chiyoda City, Tokyo
1963Constructed Iwamotocho Factory building
1969Constructed Matsunoki Warehouse and Employee Dormitory in Suginami City, Tokyo
1973Constructed and moved into New Headquarter
1978Computerized merchandise control is established
1982Tsukuba Branch is established in Tsukuba Science City, Ibaraki Pref.
1984Distribution Office is established in the Headquarter
1985Computers are installed in the Headquarter
1985Technical, Marketing and Planning Division are established
1986Purchasing and Distribution Division expanded
1988Tama Branch is established in Kunitachi City, Tokyo
1989Mishima Branch is established in Shizuoka Pref.
1990Constructed New Distribution Center in Iwamotocho, Chiyoda City
1992Yokohama Branch is established in Yokohama City
1995Tsukuba Branch relocated to Tokodai, Tsukuba City.
1998Constructed Kanda 2nd Building in Iwamotocho
1998Started partnership with Chondrex, Inc.
2000Iwai USA Inc. is established in San Jose, CA
2000Iwai USA Inc. became the majority shareholder of Chondrex, Inc.
2002Sales department is centralized in Kanda 2nd Building
2004Kashiwa Branch is established in Kashiwa City, Chiba Pref.
2006Iwai North America Inc. is established in Burlingame, CA
2008Iwai USA Inc. merged out to Iwai North America Inc.
2013Tama Branch relocated to Tachikawa City, Tokyo
2021Yokohama Branch relocated to Kawasaki City, Kanagawa and established as Kawasaki Branch