Massaro Sasaki was a recurring character in Monica's Gang.
He is a boy of Japanese descent. The little boy wears a yellow kimono, a gray ribbon (occasionally purple) around the kimono, and red slippers (sometimes brown). His hair is black (or bluish, depending on the color), and vaguely resembles the shape of Rosie and Isabel's female cut. At the back of his hair he is completely bald, with just a few small strands of hair. He also has a strand very similar to Monica and Maggy's in the back part of his hair.