Abstract
The present author has performed the investigations of coastal pollution by drifted garbage in Japan islands since February 1997. It is become clear through the author's study that a large amount of garbage drifted around the coastal arrears like plastics, bottles, cans and so on, becomes the main factor of the coastal pollution. In addition to Japanese garbage, the garbage from neighboring countries such as China, Taiwan, Korean and Russia are fairly contained in the garbage. In this report, especially, some discussions are canied out about both the problems of mangrove pollution in Iriomote island of Okinawa and the possibility of injurious chemical substances dissolved by the decomposition of drifted garbage. Then, the problem of coastal pollution by drifted garbage is a serious problem in the coastal environment in Japan. It is strongly required that both the prevention measures and the way of depositing the drifted garbage must be established in a hurry.
