The Pavillion Salamandre (2006)

Four beautiful sisters of the Ninomiya family are entrusted with taking care of Kinjiro, a giant salamander and resident national treasure. On the eve of the reptile's 150th birthday, rumors spread that Kinjiro is an impostor, so a genius x-ray technician is sent to verify the claims. And as fate would have it, he falls for one of the Ninomiya sisters.