Abstract
Morphological characters and breeding habits of Rana ishikawae are observed in some detail in Okinawahonto and Amamioshima. During the breeding season, a male frog has stayed in a hole along waters. He invites different females by calling to the same hole, and spawnings are made by these females at different times.
The breeding season seems to be taken place in the winter season in Okinawahonto, while from spring to early summer in Amamioshima.
Well-developed and young larvae are observed in summer in Okinawahonto, while in winter in Amamioshima. Well-developed larvae are obtained in streams of both islands through the year.
A considerable morphological difference is present on the back spot and tubercles between the frogs from Okinawahonto and Amamioshima.
