No, sumo is native Japanese. There's figurines of sumo wrestlers from as early as Kofun period, which was when Japan just established contacts with China. Mythic origin of sumo is from the fight between Takeminakata and Takemikazuchi, where Takemikazuchi (who is also dutied with keeping Namazu, the giant catfish that causes earthquakes (!) under control), fight for control over Japan (Takemikazuchi representing celestial, and Takeminakata the chthonic kami). Empress Kogyoku entertained Baekje Korean envoys by showing them sumo in 7th century. This was right around when Chinese culture starts dominating Japan, so it's clearly older than that.





















