AbstractChikusetsusaponin II and IVc, the minorsaponins of Panacis japonici rhizoma (rhizome of Panax japonicum C.A. MEYER) have been isolated. The structure of these saponins were established as being oleanolic acid‐(3)‐[β‐D‐glucopyranosyl (1→6)]‐β‐D‐glucuronopyranoside and 20S‐protopanaxatriol‐6‐(O‐α‐L‐rhamnopyranosyl (1→2)‐β‐D‐glucopyranoside]‐20‐O‐β‐D‐glucopyranoside.Chikusetsusaponin II is a new structure, while chikusetsusaponin IVc is identical with gi