|Founded||February 23, 1998
||Capital||JPY 900 mil (Sumitomo Corporation 100% share)|
|Sales||JPY 178.9billion (fiscal year 2019)||Employees||263 (as of March 31, 2020)|
|Year / month||Sumitomo Shoji Chemicals Co., Ltd.|
|July, 1968||Sumisho Chemicals & Plastics, Inc. was fully founded by Sumitomo Corporation.|
|April, 1992||Merged Tokyo Sumisho Polymer Technics K. K. and Osaka Sumisho Polymer Technics K. K.||
Tokyo Sumisho Polymer Technics K.K. and Osaka Sumisho Polymer Technics K.K.
|February, 1998||Sumitomo Shoji Plastics Co., Ltd. was fully founded by Sumitomo Corporation (capital JPY 450 mil)|
|April, 1998||Acquired plastics sales business from Sumisho Chemicals & Plastics, Inc.||Sumisho Chemicals & Plastics, Inc. divested plastics sales business|
|April, 1999||Sumitomo Shoji Chemicals Co., Ltd. acquired chemical business excluding agro chemicals from Sumisho Specialty Chemicals International Co., Ltd.|
|August, 1999||Sumitomo Shoji Plastics Co., Ltd. increased JPY 900 mil in capital.|
|May, 2001||Headquarters relocated to Harumi Island Triton Square|
|July, 2002||Sumitomo Shoji Plastics Co., Ltd. merged Sumisho Plaschem Co., Ltd.||Sumisho Plaschem Co., Ltd.|
|July, 2004||Sumitomo Shoji Plastics Co., Ltd. acquired organic chemical business from Sumitomo Shoji Chemicals Co., Ltd.||Sumitomo Shoji Chemicals Co., Ltd. divested organic chemical business|
|July, 2005||Sumitomo Shoji Chemicals Co., Ltd. acquired chemical business from Sumisho Medichem Co., Ltd.|
|October, 2005||Sumitomo Shoji Plastics Co., Ltd. merged Sumitomo Shoji Chemicals Co., Ltd. and Sumisho Chemicals & Plastics Nagoya Co., Ltd.
Sumitomo Shoji Plastics Co., Ltd. changed its trade name to Sumitomo Shoji Chemicals Co., Ltd.
|Sumitomo Shoji Chemicals Co., Ltd.
Sumisho Chemicals & Plastics Nagoya Co., Ltd.
|April, 2008||Sumitomo Shoji Chemicals Co., Ltd. acquired electronics device business from Sumitronics Corporation||Sumitoronics Corporation divested electronics device business.|
|April, 2018||Sumitomo Shoji Chemicals Co., Ltd. merged Soda Ash Japan Co., Ltd.||Soda Ash Japan Co., Ltd.|
|May, 2018||Headquarters relocated to Sumitomo Shoji Takebashi Bldg.|
8F, Sumitomo Shoji Takebashi Bldg., 2-2, Hitotsubashi 1-Chome, Chiyoda-ku, Tokyo 100-0003
Tokyo Metro Tozai Line (T08) “Takebashi” Exit [1B]
Tokyo Metro Hanzomon Line (Z07), Toei Mita Line (I10) and Toei Shinjuku Line (S06) “Jimbocho” Exit [A8]
Tel : +81-3-5220-8200
7F, Sumitomo Bldg., 5-33, Kitahama 4-Chome, Chuo-ku, Osaka-shi, Osaka 541-8576
Osaka Metro Midosuji Line (M17) “Yodoyabashi” Exit 
Tel : +81-6-6105-4000
44F, JR Gate Tower, 1-3, Meieki 1-Chome, Nakamura-ku, Nagoya-shi, Aichi 450-6644
JR “Nagoya” (directly connected)
Tel : +81-52-583-2180
10F, Ginsen Hiroshima Bldg., 3-2, Kamiyacho 1-chome, Naka-ku, Hiroshima-shi, Hiroshima 730-0031
Hiroshima Electric Railway “Kamiyacho-higashi”
ASTRAM Line “Hondori”
Tel : +81-82-248-8393