1902

Panama hats had become very popular in Taiwan (Taichung). Marketing the fact that these handcrafted items could not be mass-produced, Boho Sai (grandfather of the current President Hiromasa Sai) created a Limited Partnership Company and had started their business on Qingshui Street with his brothers.

1915

Boho Sai (the founder) established Senkori Shoko Co., Ltd. at the current headquarters in Chuo-ku, Kobe, as a sales base for Panama hats in Japan.
After that, the quality of Taiwanese Panama hats improved due to strict quality control in accordance with the policy of the Governor-General of Taiwan. As a result, sales in Japan increased significantly.

1945

Operations temporarily suspended due to the War.

1947

The friendship between the last President of Kawasaki Heavy Industries before the war, Shousuke Tsutaya and Shigekazu Sai (father of the current President Hiromasa Sai) was the start of the relationship between both companies.

1949

The company resumed operations under the name of The China & Japan Marine Industries Co., Ltd.
Shigekazu Sai became President and simultaneosly commenced the sale of marine paints manufactured by China Paint Co., Ltd. and Kansai Paint Co., Ltd.

1954

After the war, Kawasaki Heavy Industries became the first foreign shipowner in Hong Kong. John Manners & Co., Ltd. commissioned three new ships.

1959

Expansion of sales of engines manufactured by Yanmar Diesel Co., Ltd. (now Yanmar Co., Ltd.) and propellers manufactured by Nakashima Propeller Co., Ltd. to Southeast Asia (Hong Kong, Singapore, Macau, etc.) through the trading division of John Manners & Co., Ltd.

1967

The company was divided into two companies, The China & Japan Marine Industries Co., Ltd. and The Chunichi Kosan Co., Ltd.
Opened Sakaide Sales Office in Kagawa Prefecture. (Currently the Shikoku Branch)

1973

The Chuko building was built at the current head office location of The China & Japan Industries Building.

1985

Hiromasa Sai becomes President.

1997

Commenced exporting marine equipment and other related products to Chinese shipyards.

2004

In order to increase the operational efficiency of the Sakaide branch (currently known as the Shikoku branch), the office was moved from Sakaide city to Utazu-cho (Utazu station square).

2006

The overseas subsidiary Senkori Co., Ltd. (Dalian, China) is established.

2010

A new company building was completed through a joint venture with Yasuda Real Estate Co., Ltd.

2015

Company's 100 year anniversary.