After studying canning techniques abroad, Takasaki founded Toyo Seikan Kaisha in 1917, which has since become the largest container company in Japan and dominates the ASEAN market.[1][2]
Takasaki was in Manchuria at the end of WW2, and helped negotiate the repatriation of Japanese civilians as the head of the All Manchurian Japanese Association (Japanese: 全満日本人会) located in Xinjing, while waiting for the repatriation from Huludao.
From 1960 to 1962, Takasaki and China's Liao Chengzhi led the effort to expand trade relations between Japan and communist China, culminating in the signing of the Memorandum on Sino-Japanese Long-Term Comprehensive Trade (also known as the Liao-Takasaki Trade Agreement or simply the LT Trade Agreement).
This agreement opened the way for the resumption of a small amount of "friendship" trade between the two nations, an important step on the path to the normalization of relations between Japan and China.[4][5]