Hiromichi Osaka was born in 1937, in Kurayoshi, Tottori prefecture. In 1997, he was designated as a Living National Treasure for his woodcraft work.

After graduating from the Tokyo Gakugei University art department, Hiromichi Osaka became a public school teacher. He also became a disciple of Himi Kodo, another Living National Treasure. Under Kodo, Osaka studied woodcraft techniques such as 'kara-sashimono'. After much hard work, Osaka's work won a prize at the Traditional Japanese Crafts Exhibition.

In 1980, when he was 43, he was appointed by the Imperial Household Agency to copy a treasure from the Shoso-in. At this point, he retired from teaching and concentrated on the restoration project. The restoration imitation of a shitan wooden box was completed in 1986 and placed in the Shoso-in collection. His usage of materials such as 'kokushi' and 'shitan' using techniques and motifs from the Shoso-in wooden pictures and carvings have been highly praised.