Sanuki, the Sea of ​​Stones

…Around the Kenkyu era (1190-99), he resumed his service to Emperor Gotoba's Empress Gishumon'in, and in his later years he became a monk. He is famous for his poem "My sleeves are like rocks in the ocean, invisible at low tide, and no one knows how dry they are" (Senzaishu), earning him the nickname "Sanuki, the rocks in the ocean." His poems are characterized by a lyricism that is subdued and unobtrusive, and 74 of his poems have been included in imperial anthologies starting with Senzaishu. …

*Some of the terminology used in reference to "Oki no Ishi no Sanuki" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…建久(1190‐99)ごろには後鳥羽院中宮宜秋門院に再出仕し，晩年出家。〈我袖は潮干に見えぬ沖の石の人こそ知らね乾くまぞなき〉(《千載集》)が有名で，〈沖の石の讃岐〉の異名を得た。技巧の目立たない沈潜した抒情に特色があり，《千載集》以下の勅撰集に74首入集する。…

※「沖の石の讃岐」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報