Koyama Fujio (小山富士夫 ; March 24, 1900-October 7, 1975) was a scholar of Japanese pottery and porcelain and Chinese ceramics. He was also a potter in his own right.
Amongst his publications are:
He developed the category of the Six Ancient Kilns of Japan.
The Idemitsu Museum of Arts in Tokyo dedicated a retrospective "Tsuchi ni Asobu, To ni Manabu" (Play With Clay, Learn From Pots) in the spring of 2000.