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Haraguchi was born in 1940 in Tokyo. He attended Hibiya High School, and attended college at the University of Tokyo. After graduating, he entered the Ministry of Foreign Affairs in 1964 and rose through the ranks. After serving as the consul general in Los Angeles, he became the Director-General of Economic Affairs Bureau, and later the Deputy Minister for Foreign Affairs. Haraguchi also served as the ambassador extraordinary and plenipotentiary to both the Japanese diplomatic mission in Geneva and the United Nations.
In July 2007, Haraguchi was appointed to the Grand Master of the Ceremonies of the Imperial Household Agency.
- Sadako Ogata, also former Ambassador to United Nations
- Hisashi Owada, also former Deputy Minister for Foreign Affairs and former Ambassador to United Nations
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- Grand Master of Ceremonies – compare pre-Meiji Chief of the Ministry of Ceremonies (治部卿,? Jibu-kyō) at Daijō-kan.
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