Yokozuna debutant Kisenosato burst Sokokurai's bubble Wednesday to preserve his unbeaten start on a day when two of his main rivals crashed to upset defeats at the Spring Grand Sumo Tournament.
Kisenosato improved to 4-0 as the only yokozuna yet to taste defeat at the 15-day meet as Kakuryu was saddled with his first loss before Hakuho dropped to 2-2 in another shock at Edion Arena.
Kisenosato shares the early lead with Mongolian ozeki Terunofuji and four other wrestlers.