Aoiyama Kōsuke, Bulgarian sumo wrestler

Aoiyama Kōsuke is a Japanese former professional sumo wrestler or rikishi from Elhovo, Bulgaria. He made his professional debut in 2009, reaching the top division two years later, debuting in the November 2011 tournament. Aoiyama has won four Fighting Spirit awards, one Technique award and one kinboshi for defeating a yokozuna. He was twice runner-up in a tournament. His highest rank was sekiwake. Aoiyama was one of the heaviest competitors in sumo, weighing around 200 kg for most tournaments. In March 2022, he obtained Japanese citizenship.