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About Mitsui Sumitomo Insurance Company, Limited
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Mitsui Sumitomo Insurance was formed in October 2001 through a merger between the former Mitsui Marine & Fire Insurance Co., Ltd. (Mitsui Marine) and the former The Sumitomo Marine & Fire Insurance Co., Ltd. (Sumitomo Marine). Mitsui Marine and Sumitomo Marine were leading non-life insurance companies boasting long histories, having been established in 1918 and 1893, respectively.

Corporate profile, history and brand aspiration

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About MS&AD Insurance Group Holdings, Inc

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MS&AD Insurance Group was formed in April 2010 from the business integration of Mitsui Sumitomo Insurance Group Holdings, Inc., Aioi Insurance Co., Ltd., and Nissay Dowa General Insurance Co., Ltd. 

MS&AD Insurance Group is committed to achieving sustainable growth and to enhancing enterprise value through the creation of a world-leading insurance and financial services group with global operations.
MS&AD Holding’s continued growth is driven by five business domains: domestic (Japanese) non-life insurance, domestic (Japanese) life insurance, overseas business, financial services business and risk-related business.

MS&AD Insurance Group


The origins of Mitsui
Mitsui origin image

"Echigo-ya" Drapery Store in the Edo Era.

Mitsui origin

Takatoshi Mitsui

Mitsui origin

Echigoya - The name "Echigoya" was publicised by means of "flyers" and branded loan umbrellas. ©公益財団法人三井文庫

The Mitsui conglomerate began as a shop dealing in kimono fabrics called “Echigoya”. It was opened in 1673 by Takatoshi Mitsui, a merchant in Edo (now Tokyo). 

With the aim of accommodating its customers’ needs, Echigoya introduced many innovative business practices. These included adopting over-the-counter-sales and the cash-and-carry system which were unheard of in Japan at the time. Furthermore, Mitsui used flyers and umbrellas printed with the shop's name to publicise his business.

Mitsui also focused on customer-centric business management and brand strategy, and sought to boost employee motivation and satisfaction through personality-oriented performance evaluations. These pioneering approaches laid the foundation for Mitsui’s subsequent success and prosperity.

The origins of Sumitomo
Sumitoro origins iamge

Masatomo Sumitomo 
© 住友史料館

Sumitoro origins iamge

Sumitomo prospered through diversification beyond copper into such commodities as yarns, fabrics, sugar and medicine.
© 住友史料館

Sumitoro origins iamge

A shaft at the Besshi copper mine
© 住友史料館

The history of Sumitomo began in the 17th century when Masatomo Sumitomo opened a book and medicine shop in Kyoto. Sumitomo gradually diversified into copper mining and trading, banking and heavy industry. 

In 1690, Sumitomo discovered the Besshi Copper Mine in Ehime Prefecture which turned out to be one of the largest copper mines in the world. This major discovery contributed significantly to Japan’s economic development. However, the mining operations also impacted the environment. To help reduce this, Sumitomo planted more than one million trees and even relocated the copper refinery to an uninhabited island.

Sumitomo’s approach of contributing to the development of national and regional economies while also addressing environmental issues sowed the seeds for our corporate social responsibility initiatives of today.

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*Partnership with National Insurance Company of Brunei


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Our credit ratings
Standard & Poor's Ratings Japan K.K.
A+ Stable
Mitsui Sumitomo
Insurance Co., Ltd.
A+ Stable
MSIG Insurance (Hong Kong) Ltd.
A+ Stable
MSIG Insurance (Singapore) Pte. Ltd.

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