The methanol extract of heartwood of Cercidiphyllum japonicum (Cercidiphyllaceae) stimulated proliferation of mouse hair epithelial cells, similar to minoxidil and procyanidin B-2. (+)-Taxifolin ( 2), quercetin ( 3), myricetin ( 4), (+)-dihydromyricetin ( 5) and gallic acid ( 6) were isolated from