Other sumo wrestlers to have fought in mixed martial arts include Alan Karaev, Kōji Kitao, Henry Armstrong Miller, Akebono Tarō, Teila Tuli and Wakashoyo.
He then signed with K-1, a kickboxing and mixed martial arts organization, fighting under his old shikona (He uses the Latin script, appearing as "WAKASHOYO" rather than using the Japanese characters. The Sumo Association requested that Konishiki do the same thing in his post-sumo career).