Akizuki Satsuo

was a diplomat and government official of the in the Imperial Household Ministry. He was born in Hyūga Province.

He was the third of four sons. His father, was an elder of the Takanabe Domain. His younger brother, , was an official in the Ministry of Agricultural and Trade Affairs, and contributed to the growth of the Sumitomo Zaibatsu. was his brother-in-law.

He graduated from the Han school called founded by . He attended Kagoshima Medical School, but dropped out. He graduated from the Japanese Ministry of Justice Law School.

He worked in the Ministry of Justice for a time, but then became a diplomat. He worked as a diplomat to Sweden, the Japanese ambassador to Belgium, and the ambassador extraordinary to Austria-Hungary, before leaving office in 1914. He worked as a plenipotentiary advisor at the Paris Peace Conference in 1919.

During his time as ambassador to Belgium, in 1908, he observed a British Boy Scout event. He reported his findings to others, which spread word of the Boy Scout movement to Japan.

He was an editorial advisor for (and later president of) the Asahi Shimbun newspaper, worked as the head of the Keijō Nippō newspaper, and was also deputy leader of the . Together with the politician , he put much effort into the foundation of , "The Value-Creating Education Society", the former incarnation of Soka Gakkai. He later become the member of the lay organisation and praticising Nichiren Buddhism.