I have mentioned before in previous posts about the roof decoration of the old buildings in Japan. This is just one of the many patterns that adorn the circular end tiles of a roof. If you look closely, the same pattern can be seen on the end of every ridge in the roof, but note that they differ from roof to roof. At the edges of the scalloped tiles between them, there are also patterns, different to what are on the circular ends. Then of couse there is the dragon/lion head at the ends.