An avian sternum is yielded from the Middle to Late Eocene Kachidachi Formation, Manda Group, Omuta City, Kyushu, Japan. The material is an imperfect small sternum, with pronounced and anteriorly- projected keel. This report is the first record of Eocene bird from Japan. Judging from these characters, the bird is probably of Pelecaniformes. It shows good concordance to the marine nature of the Kachidachi Formation. Among the families of Pelecaniformes, the size and shape of this specimen is not concordant to the plotopterids flourished in Oligocene northern Kyushu, and similarities to the Family Pharacrocoracidae are seen. This occurrence suggests further find of vertebrate fossils from that district.
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