Date of Birth: 
About Asashio Tarō IV
- Asashio Taro IV (born 9 December 1955 as Suehiro Nagaoka) is a former sumo wrestler from Muroto, Kochi, Japan.
- His highest rank was ozeki.
- A former amateur champion, he turned professional in 1978.
- He won one top division tournament championship and was a runner-up on four other occasions.
- He won fourteen special prizes, including a record ten Outstanding Performance Awards, and five gold stars for defeating yokozuna.
- He retired in 1989 and became head coach of the Wakamatsu stable, which in 2002 merged with Takasago stable.
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