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These rocky islets are described as follows in the U.S. Hydrographic Office publication no. 123A, Sailing Directions for Japan, Volume I (1st ed., 1945):


 * (37°15' N., 131°52' E., H.O. Chart 3320) consist of two barren, guano-whitened, and uninhabited rocky islets and several rocks, which appear to be steep-to. They lie near the steamer track leading from Tsushima Strait to Vladivostok and to Hokkaido, in a position 85 miles northwestward of the Oki Retto, and as they have no navigational aids they present a hazard to mariners navigating in their vicinity at night or in thick weather. Both islets are cliffy, and the western and highest has a pointed summit, which rises 515 feet. They are usually visited by seal hunters in July and August (p. 597)


 * Attachment:
 * Excerpt


 * OIR/GE:SWBoggs:mg
 * 7-13-51

RG 59, Records of the State, Decimal File 1950-54, 694.001 Series