Abstract
Shallow sub-bottom structures of Guyots on and around Ogasawara Rise are determined from the Bouguer anomalies over the top plane of the Guyots. It was found from the result that the Guyot east of Ogasawara Rise is covered with a relatively thin sedimentary layer, while the seamount on the Rise has a thick sedimentary layer of about 1km in thickness. Moreover, it was concluded from the inclination of the Rise and of the seamount on it that the whole rise is inclined from the horizontal plane by an angle of about 1 degree although nothing is known about the cause of such an inclination.
