In the distal areas from Quaternary volcanoes, like the Shikoku, Kinki and Tokai districts of western Japan, studies on terraces have not progressed due to lack of visible volcanic ash. Those studied were mainly approached from the geomorphological point of view, and therefore it is difficult to determine absolute ages and correlations between terraces. In the Suzuka river area, which is located in the west coast area of Ise Bay, there are no reports on terrace deposits with intercalated volcanic ash layers or on the absolute age of terraces.<br>In this study, we took a comprehensive approach, integrating aerial-photo interpretation, investigation on the geology and geomorphic features, and analysis of volcanic glasses which are included in finer deposits overlying the terrace gravels. (Finer deposits here means those mainly consist of eolian deposits and formed after terracing.) The following results were obtained.<br>1. The terraces of the Suzuka river area are classified into five, namely, Otani-ike terrace, Maruoka-ike terrace, Kambe terrace, Seki terrace, and Furu-umaya terrace in descending order of elevation. Kambe terrace is further subdivided into three terraces named Kambe 1, Kambe 2, and Kambe 3. Seki terrace is also subdivided, into Seki 1 and Seki 2.<br>2. Finer deposits overlying terrace gravels can be characterized by their color. At Otani-ike terrace and Maruoka-ike terrace, finer deposits are subdivided into reddish brown, yellowish brown, and dark brown units in ascending order. And at Kambe terrace, finer deposits are subdivided into yellowish brown and dark brown units in ascending order. At both Seki terrace and Furu-umaya terrace, all finer deposits show dark brown to black color.<br>3. At Otani-ike terrace and Maruoka-ike terrace, reddish brown units contain few volcanic glass. The yellowish brown units in Otani-ike terrace, Maruoka-ike terrace, and Kambe terrace include volcanic glasses that can be correlated with Aira-Tn volcanic ash (25-21ka). The blackish units in Otani-ike terrace, Maruoka-ike terrace, Kambe terrace, Seki terrace, and Furu-umaya terrace contain volcanic glasses which derived from Kikai-Akahoya volcanic ash (6.3ka).<br>4. In Seki terrace deposit, one tephra layer was identified with Aira-Tn volcanic ash. A previous study reported intercalation of marine clay in the Kambe terrace deposit. Together with the characteristics of volcanic glasses included in finer deposits, it is clear that Otani-ike and Maruoka-ike terrace deposits were formed before the Last Interglacial, Kambe terrace deposit during the Last Interglacial, Seki terrace deposit during the Last Glacial, and Furu-umaya terrace deposit after the Last Glacial.