The following constituents were isolated from the heartwood of Juniperus chinensis LINN. var. tsukusiensis MASAM. : cedrol, thujopsenal, widdrol, sandaracopimaric acid, hinokiic acid, 12-hydroxy-α-longipinene and 15-hydroxyacora-4(14), 8-diene. The latter two compounds are new tricyclic and spirobicyclic sesquiterpenes, and their structures were elucidated on the basis of spectral and chemical evidence.