This is a red kite, which is a variety of small hawk common around Lake Biwa, Japan. We saw him on our walk earlier this week.
We took the kids on a walk to Lake Biwa today, and saw many grey herons roosting in the treetops. Fortunately, I had a long-range lens for my camera.
I saw this guy roosting on a telephone poll while I was waiting for the bus today near my house. It is a black kite (a sort of small hawk). In Japan they call the bird a tonbi (鳶).