This is the radial motor version... not as nice. Even not any Mistu´, but the radial motor version used a
Mitsubishi MK8P Kinsei engine. The Yokosuka was indeed inspired by a Heinkel prototype, the HE 118 though, but have nothing to do with either license build or ME 163.
The inline version motored did use a
Aichi Atsuta liquid-cooled inverted
V12 engine, who was a licensed copy of the German
DB 601 engine., and the second plane who is inline engine powered, is in museum in Japan.