Former yokozuna Musashimaru believes the absence of a Japanese wrestler at sumo's highest rank of grand champion is contributing to the continuing slide in popularity of the national sport.

News photoFormer yokozuna Musashimaru talks at a news conference at the Foreign Correspondents' Club in Tokyo.

And the Samoan-born 12-time Emperor's Cup winner, who drew the curtain on an illustrious but injury-interrupted career last November, says he does not think the current crop of ozeki in the makuuchi division have what it takes to reach sumo's summit.