Professor Masao Kawai, a pioneer and leading scholar in primatology and writer of animal stories for children.

This Editorial is dedicated to Professor Masao Kawai (Fig. 1), who passed away on May 14th, 2021. He served as the sixth Editor-in-Chief of Primates for 15 years (1981-1995). The following is a collection of memories from 20 scholars. Fig. 1 Professor Masao Kawai, a pioneer and leading scholar in primatology (photo taken in January 2020; Courtesy of Ryoko Kawai).