Tropical and subtropical drift fruits and seeds were collected on the Goto Islands in western Japan from 1981 to 2022. Totally 25 species and 410 fruits and seeds were recorded. Frequent drift fruits and seeds were those of Cocos nucifera （52.2％）, followed by Terminalia catappa （19.0％） and Barringtonia asiatica （10.7％）. The morphology of drifts seeds of Leguminosae was compared among the same genera.

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Drift fruits of Apocynaceae on the coast of Japanese Islands were studied. Three species were identified, Cerbera manghas, C. odollam and Ochrosia oppositifolia. Drift fruits of these species have been confused with each other, especially C. manghas and O. oppositifolia. Although typical fruits of these three species can be distinguished based in size, shape and character of fibrous mesocarp, it is often difficult to identified because their sizes were varied and different appearances of fruits by the floating period in seawater. It was clarified that the cavity of kernel or seed size and the wall thickness of endocarp, which can be seen by cross section of the drift fruit, differ among species.

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Drift seeds of the genus Intsia（Leguminosae on the coast of Japanese Islands were studied. Two species were drifted; I. bijuga and I. palembanica which have been confused. The seeds of I. bijuga is broadly ellipitic and averaged 26.9 mm in length, 23.3 mm in width, 7.7 mm in height. The seeds of I. palembanica is oblong to obovate and averaged 37.3 mm in length, 25.1 mm in width, 11.1 mm in height. The length and the height were significantly different between them.

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