Doraemon Movie 30: Nobita no Ningyo Daikaisen

Nobita asks Doraemon to take him to a place where they can dive, and the robot cat uses several gadgets to create an imaginary ocean above sea level so that both can swim. When the illusion is turned off, a mermaid named Sophia, princess of an ancient underwater civilization, ends up in Nobita’s backyard. Doraemon, Nobita, Shizuka, Jyaian, and Suneo quickly become her friends and are invited to visit her homeland. On the way to the underwater kingdom, they find themselves in the middle of a conflict between the mermaids and an opposing tribe that had driven them from their home planet thousands of years ago. Doraemon, Nobita, and their friends must then aid Sophia find a…