Tamanoshima Arata (born September 15, 1977 as Arata Okabe) is a former sumo wrestler from Izumizaki, Fukushima, Japan. A former amateur champion, he made his professional debut in 1998, reaching the top makuuchi division at the end of 2000. He was twice runner-up in a tournament, and earned six special prizes and two gold stars during his career. His highest rank was sekiwake. He wrestled for Kataonami stable.

Tamanoumi Masahiro, (auch Tamanoshima Masao; jap. 玉の海 正洋, 정정부, 鄭正夫, Jung Jung-bu; * 5. Februar 1944 im Gamagōri, Präfektur Aichi; † 11. Oktober 1971) war ein japanischer Sumōringer und der 51. Yokozuna.