The shape of these small windows on the Prinsengracht is clearly a replica of the windows and gables all over Amsterdam. But they also look like what in Japan is the kato-mado火灯窓, or firelight window. Called firelight because the ondulating top ogee is reminiscent of a burning flame.
However, the bad fortune associated with fires and homes encouraged a name change to the flower-head window, as it was also reminiscent of a flower, specifically a tulip.
Prinsengracht / Jacob van Lennepkade Amsterdam Temple of the Shining Mercy / Ginkaku-ji Kyoto