We operate in 16 countries and regions, including Japan. Manufacturing sites are as shown in the figure below.
Group Companies (As of June 1, 2024)
| Business sites in Japan | Field* | Each Office |
| Japan | HPP, QOL | Shizuoka Plant |
|---|---|---|
| QOL | Kanuma Plant (including Kanuma Plant of S.B. Sheet Waterproof Systems Co., Ltd.) | |
| Semiconductor | Utsunomiya Plant (including Head Office (Utsunomiya) of S.B. Research Co., Ltd.) | |
| QOL | Amagasaki Plant | |
| QOL | S.B. Sheet Waterproof Systems Co., Ltd. (Nara Plant) | |
| Semiconductor | Kyushu Sumitomo Bakelite Co., Ltd. | |
| HPP | Yamaroku Kasei Industry Co., Ltd. | |
| HPP, QOL | Akita Sumitomo Bakelite Co., Ltd. | |
| QOL | Hokkai Taiyo Plastic Co., Ltd. | |
| QOL | S.B. Techno Plastics Co., Ltd. (Head Office Plant and Kitsuregawa Plant) | |
| QOL | SB Kawasumi Laboratories Inc. (Head Office and Oita Business Site (Saiki, Notsu and Mie Plants)) | |
| QOL | SB PAX Co., Ltd. | |
| - | Head Office | |
| - | Nagoya Office | |
| - | Osaka Office | |
| - | Kobe Facility Office | |
| China | Semiconductor | Sumitomo Bakelite (Suzhou) Co., Ltd. |
| HPP | Sumitomo Bakelite (Shanghai) Co., Ltd. | |
| HPP, QOL | Sumitomo Bakelite (Nantong) Co., Ltd. | |
| QOL | Sumitomo Bakelite (Dongguan) Co., Ltd. | |
| HPP | Vaupell China (Dongguan) Co., Ltd. | |
| Macau | HPP | Sumitomo Bakelite Macau Co., Ltd. |
| Hong Kong | - | Sumitomo Bakelite (Hong Kong) Co., Ltd. |
| Taiwan | Semiconductor | Sumitomo Bakelite (Taiwan) Co., Ltd. |
| - | Sumibe (Taiwan) Co., Ltd. | |
| South Korea | - | Sumibe Korea Co., Ltd. |
| India | - | SBE India Pte. Ltd. |
| Malaysia | HPP | SNC Industrial Laminates Sdn. Bhd. |
| Singapore | Semiconductor | Sumitomo Bakelite Singapore Pte. Ltd. |
| HPP | SumiDurez Singapore Pte. Ltd. | |
| Indonesia | HPP | PT. Indopherin Jaya |
| QOL | P.T. SBP Indonesia | |
| Thailand | QOL | Kawasumi Laboratories（Thailand）Co., Ltd. (Nava Nakorn Plant/Korat Plant) |
| - | Sumitomo Bakelite (Thailand) Co., Ltd. | |
| Canada | HPP | Durez Canada Co., Ltd. (Fort Erie) |
| USA | HPP | Sumitomo Bakelite North America, Inc. (Manchester Plant) |
| HPP | Durez Corporation (Kenton Plant) | |
| HPP | Durez Corporation (Niagara Falls Plant) | |
| HPP | Vaupell Industrial Plastics, Inc. | |
| HPP, QOL | Vaupell Molding & Tooling, Inc. (Agawam, Massachusetts Plant) | |
| HPP, QOL | Vaupell Molding & Tooling, Inc. (Constantine, Michigan Plant) | |
| HPP, QOL | Vaupell Molding & Tooling, Inc. (Hudson, New Hampshire Plant) | |
| HPP | Russell Plastics Technology Company, Inc. | |
| - | Vaupell Holdings, Inc. | |
| - | Promerus, LLC | |
| - | Kawasumi Laboratories America, Inc. | |
| - | Sumitomo Plastics America, Inc. | |
| Germany | Vaupell Europe GmbH | |
| Belgium | HPP | Sumitomo Bakelite Europe NV |
| HPP | Sumitomo Bakelite Europe (Ghent) NV | |
| Spain | HPP | Sumitomo Bakelite Europe (Barcelona), S.L.U. |
※ Semiconductor: Semiconducor Materials, HPP: High-Performance Plastics, QOL: Quality of Life Products