The context here is that Onosato’s stablemaster is Kisenosato, who became the first Japanese yokozuna in 2017 following Wakanohana’s retirement in 2000. He won his first basho as yokozuna, but sustained shoulder and chest injuries that he would never fully recover from. After a series of losses and absences he had one final winning record (going 10-5) in 2018, and then retired during the January basho of 2019.