Sumitomo Chemical
A major Japanese diversified chemical company whose businesses range from petrochemicals and basic materials to pharmaceuticals, crop protection, electronics materials, and household insecticides.
Last updated August 31, 2026
AI crawler reads
No AI crawler has read this profile since Oct 28, 2026.
Overview
Sumitomo Chemical is a diversified Japanese chemical company and a core member of the Sumitomo Group. Its origins date to 1913, when the House of Sumitomo established a fertilizer plant in Ehime to recover sulfur dioxide from emissions generated by copper smelting. The venture linked industrial pollution control with commercial chemical production: sulfur compounds that might otherwise have been released into the environment were converted into fertilizer for agriculture. Commercial operations began in 1915, and the business was incorporated as Sumitomo Fertilizer Manufacturing Co., Ltd. in 1925. It adopted the Sumitomo Chemical name in 1934. The company expanded beyond fertilizer during the twentieth century through acquisitions, new production sites, research facilities, and participation in large industrial projects. Its 1944 acquisition of Japan Dyestuff Manufacturing Company gave it a foothold in fine chemicals. In 1949 it took over Sumitomo Aluminium Smelting's aluminum operations, although that business was later transferred to a separate company. Petrochemicals became an important growth area after operations began at Ehime in 1958 and were subsequently consolidated and expanded through the Chiba Works and overseas projects. Sumitomo Chemical was a leading participant in the Singapore petrochemical complex, which began operating in 1984 and underwent major expansion in the 1990s. The company has also developed businesses closer to consumers and high-technology manufacturing. Its agricultural-chemicals activities include crop-protection products, insecticides, and related technologies. Household insecticides became a significant area, strengthened by the acquisition of Aventis CropScience's household insecticide business in 2001 and later expansion in Asia and India. Pharmaceuticals developed through Sumitomo Pharmaceuticals, established in 1984 by consolidating Sumitomo Chemical's pharmaceutical operations with the relevant business of Inabata & Co.; the pharmaceutical operation later became part of Dainippon Sumitomo Pharma after a 2005 merger. Sumitomo Chemical has also produced display-related materials, including LCD color filters and polarizing films, and acquired Cambridge Display Technology in 2007 to strengthen its position in polymer organic light-emitting diode technology. Large-scale international partnerships have been central to the company's industrial strategy. In 2005, Sumitomo Chemical and Saudi Aramco established Petro Rabigh, an equally owned refining and petrochemical joint venture. The integrated complex in Saudi Arabia began operations in 2009. In crop protection, the company expanded through acquisitions and investments in India, including New Chemi Industries and a stake in Excel Crop Care, and acquired a majority interest in Botanical Resources Australia Group in 2017. Today, Sumitomo Chemical presents itself as a global chemical enterprise organized around several broad fields: essential and performance chemicals, petrochemicals and plastics, energy-related materials, health and crop-science products, pharmaceuticals, and information or electronics-related materials. Its portfolio reflects the traditional Japanese integrated-chemical model, combining upstream manufacturing with specialty materials, applied research, and businesses serving agriculture, healthcare, consumer products, and electronics. The company operates production, research, and commercial facilities in Japan and international markets. Public reference material identifies it as a constituent of the Nikkei 225 and a company listed on the Tokyo Stock Exchange.
History
Sumitomo Chemical began in 1913 as a fertilizer initiative of the House of Sumitomo. The original plant, established in Ehime, was designed to recover sulfur dioxide produced by copper smelting and convert it into fertilizer. Production started in 1915, and the operation was incorporated in 1925 as Sumitomo Fertilizer Manufacturing Co., Ltd. The company adopted its present name in 1934. Its first major diversification came in 1944, when it acquired Japan Dyestuff Manufacturing Company. This move established a fine-chemicals presence and added operations associated with the Osaka and Oita works. In 1949, Sumitomo Chemical assumed Sumitomo Aluminium Smelting's aluminum business and began integrated alumina-to-aluminum production. The aluminum business was later separated and transferred to Sumitomo Aluminium Smelting Co., Ltd. in 1976. Petrochemicals became a central business after Sumitomo Chemical started production at Ehime in 1958. The company strengthened research through the Takatsuki Research Laboratory in 1965 and created Sumitomo Chiba Chemical to develop petrochemical operations at Chiba. In 1983, petrochemical activities at Ehime were integrated into Chiba. The company also participated in the Singapore petrochemical complex, which began operations in 1984. A second-phase expansion in the 1990s added a large ethylene cracker and downstream facilities, making the complex one of the largest integrated petrochemical sites in East Asia at the time. Research and development expanded into pharmaceuticals, agricultural chemicals, environmental health, and advanced materials. The Takarazuka Research Center was established in 1971, while the Biochemistry and Toxicology Laboratory opened in 1988 and was later renamed the Environmental Health Science Laboratory. The Tsukuba Research Laboratory followed in 1989 to support new-materials research. Sumitomo Pharmaceuticals was established in 1984 by combining Sumitomo Chemical's pharmaceutical operations with the pharmaceutical division of Inabata & Co. Its pharmaceutical business later combined with Dainippon Pharmaceutical in 2005 to form Dainippon Sumitomo Pharma. During the 1990s and 2000s, Sumitomo Chemical broadened its portfolio into information-related chemicals and display materials. It established genomic research laboratories in 2000, created an IT-related Chemicals Sector in 2001, and developed LCD color-filter and polarizing-film production in Korea and Taiwan. In 2007, it acquired Cambridge Display Technology, a developer of polymer organic light-emitting diode technology, making the company a wholly owned subsidiary. International industrial partnerships and acquisitions subsequently shaped the company's growth. In 2005, Sumitomo Chemical and Saudi Aramco formed Petro Rabigh, an equally owned refining and petrochemical venture. Its integrated complex began operations in 2009. The company also pursued agricultural-chemicals expansion in India through New Chemi Industries in 2010 and Excel Crop Care in 2016, and expanded its crop-science interests in Australia through the 2017 acquisition of a majority stake in Botanical Resources Australia Group. The modern company combines commodity and performance chemicals with specialty materials and life-science businesses. Its activities cover petrochemicals, basic chemicals, energy-related materials, pharmaceuticals, crop protection, household insecticides, electronics materials, and fine chemicals. Sumitomo Chemical remains headquartered in Tokyo and operates internationally through manufacturing, research, joint ventures, subsidiaries, and commercial organizations.
- 2017
Australian crop-science expansion
[1]Sumitomo Chemical acquires 82.9 percent of Botanical Resources Australia Group.
- 2009
Petro Rabigh complex starts operations
[1]The integrated Saudi refining and petrochemical complex begins operating.
- 2007
Cambridge Display Technology acquired
[1]The developer of polymer OLED technology becomes a wholly owned subsidiary.
- 2005
Petro Rabigh established
[1]Sumitomo Chemical and Saudi Aramco establish their refining and petrochemical joint venture.
- 2001
Household insecticide and IT-chemicals expansion
[1]The company acquires Aventis CropScience's household insecticide business and establishes an IT-related Chemicals Sector.
- 1984
Singapore petrochemical complex begins operations
[1]A Japan-Singapore cooperation project with Sumitomo Chemical as a leading participant starts production.
- 1965
Research and Chiba petrochemical expansion
[1]The Takatsuki Research Laboratory is completed and Sumitomo Chiba Chemical begins petrochemical operations.
- 1958
Petrochemical operations begin
[1]Sumitomo Chemical starts petrochemical production at Ehime.
- 1944
Entry into fine chemicals
[1]The acquisition of Japan Dyestuff Manufacturing Company establishes a fine-chemicals business.
- 1934
Name changed to Sumitomo Chemical
[1]The company adopts the Sumitomo Chemical name.
Products and positioning
A diversified, research-intensive Japanese chemical group serving industrial, agricultural, healthcare, consumer, and electronics markets.
Industrial chemicals · 1958
Petrochemicals and basic chemicals
This business includes upstream and intermediate chemical products produced through Sumitomo Chemical's Japanese and overseas petrochemical infrastructure. The portfolio developed from the company's Ehime and Chiba operations and expanded through the Singapore and Petro Rabigh complexes. It supports downstream manufacturing in plastics, resins, solvents, intermediates, and other industrial applications.
Agricultural chemicals
Crop-protection products
Sumitomo Chemical develops and markets agricultural chemicals used to protect crops and improve agricultural productivity. The business has been expanded through research, joint ventures, and acquisitions in India, Australia, and other markets. Its crop-science activities include insecticides and other crop-protection technologies.
Consumer health
Household insecticides
Household insecticide products are intended for consumer and public-health applications. Sumitomo Chemical strengthened this category through the acquisition of Aventis CropScience's household insecticide business in 2001 and has used its insect-control expertise across international markets.
Pharmaceuticals · 1984
Pharmaceutical products
Sumitomo Chemical's pharmaceutical activities were consolidated in Sumitomo Pharmaceuticals in 1984 and later combined with Dainippon Pharmaceutical in 2005 to create Dainippon Sumitomo Pharma. The business represents the company's principal healthcare and drug-development platform.
Electronics materials · 2003
Display materials
The company produces materials used in flat-panel displays, including LCD polarizing films and color filters. Manufacturing facilities were established in Korea and Taiwan during the 2000s. These activities form part of Sumitomo Chemical's broader information-related and advanced-materials portfolio.
Electronic materials · 2007
Polymer OLED materials and technologies
Sumitomo Chemical expanded into polymer organic light-emitting diode technology through its 2007 acquisition of Cambridge Display Technology. The technology complements the company's broader interest in advanced display and electronic materials.
Specialty chemicals · 1944
Fine chemicals
Fine chemicals became part of the company's portfolio after the 1944 acquisition of Japan Dyestuff Manufacturing Company. The category supports specialized industrial and technology applications and reflects Sumitomo Chemical's move beyond fertilizer and commodity chemicals.
Brand decisions
2017
Acquisition of Botanical Resources Australia GroupM&ABackground
Sumitomo Chemical pursued international expansion in crop science and agricultural inputs.
Action taken
The company acquired 82.9 percent of Botanical Resources Australia Group.
Aftermath
The investment broadened the company's Australian crop-science platform.
2016
Investment in Excel Crop CareM&ABackground
The company continued to build its Indian crop-protection business.
Action taken
Sumitomo Chemical acquired shares held by the promoters of Mumbai-based Excel Crop Care.
Aftermath
The transaction strengthened Sumitomo Chemical's position in India's agrochemical industry.
2010
Acquisition of New Chemi IndustriesM&ABackground
Sumitomo Chemical identified India as a growth market for crop-protection products.
Action taken
The company acquired Indian agrochemical manufacturer New Chemi Industries Ltd.
Aftermath
The transaction expanded the company's manufacturing and commercial base in India's agricultural-chemicals market.
2007
Acquisition of Cambridge Display TechnologyM&ABackground
The company aimed to reinforce its advanced-materials and display-technology activities.
Action taken
Sumitomo Chemical acquired Cambridge Display Technology and made it a wholly owned subsidiary.
Aftermath
The acquisition added polymer OLED research and related device technology to the group's electronics-materials portfolio.
2005
Establishment of Petro RabighM&ABackground
Sumitomo Chemical sought to expand its integrated refining and petrochemical presence through an international partnership with Saudi Aramco.
Action taken
The two companies established Petro Rabigh as an equally owned joint venture.
Aftermath
The joint venture's integrated refining and petrochemical complex began operations in 2009.
Recent events
Sumitomo Chemical launches Meguri sustainable resins brand[3]
Reported:
Sumitomo Chemical launched Meguri, a brand of products derived from plastic recycling technology, including recycled plastic materials such as PMMA, polyethylene and polypropylene.
- Unconfirmed
Sumitomo Chemical completes acquisition of four Nufarm subsidiaries in South America[4]
Reported:
Sumitomo Chemical announced that it had successfully acquired four Nufarm subsidiaries in Brazil, Argentina, Chile, and Colombia. The article does not specify when the acquisition was completed.
Sources4 sources
Cite this profile: Cite the canonical profile. /brand-wiki/sumitomo-chemical · Editorial policy · How profiles are compiled