He made his debut in 2009, reaching the top division two years later, debuting in the November 2011 tournament where he won the Fighting Spirit award along with Wakakōyū.
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He subsequently changed his name to Aoiyama Kōsuke for his jonidan debut in the following November tournament, which he also won with a 7-0 record followed by a playoff win against the sole Kazakhstani wrestler Kazafuzan.
Kosuke Matsuura | Kosuke Fukudome | Kōsuke Fujishima | Kosuke Endo |