Images of the sunset from TBS.
TBS News has a short video of an unusual sunset viewed from the cape of Notoro on the northern island of Hokkaido. Atmospheric effects above the surface of the sea caused the setting sun to go from its usual circular shape to a mushroom shape, then a sort of bowl shape, and finally a striking trapezoid. The extreme temperature difference that causes this sort of mirage is rare during the summer; it’s usually a winter oddity.
[Update: Video is no longer on TBS's site, but here it is on YouTube.]