The Liberal Democratic Party should return the money provided to it under the guise of party membership fees by an affiliate of the scandal-tainted industrial mutual aid organization KSD, the leader of the LDP's key coalition partner said Sunday.

The KSD affiliate is alleged to have channeled hundreds of millions of yen to the LDP as "party membership" fees for tens of thousands of nonexistent members.

Takenori Kanzaki, chief of New Komeito, told a Fuji TV program Sunday morning that the practice could amount to illegal forgery of private documents.