My posts on the round windows of Japan have been popular, so here is a selection of ones I've found recently. This first one has to be one of my favorites. It is in an outbuilding in Henshoin Garden, in Kurume, Fukuoka Prefecture.
This one is in the Ohashi House, a wealthy merchants home in Kurashiki, Okayama Prefecture.
This one is in a shelter in the garden next to Fukuyama Castle in Hiroshima Prefecture.
Korakuen garden in Okayama.
The Chinese garden Enchoen, on the shore of Togo Lake in Tottori.