The first truly Japanese-style encyclopedia is said to be Minamoto no Shitagō's 10-scroll work, Wamyō Ruijushō, which was written in the ancient Japanese syllabary system of man'yōgana and contained entries arranged by category.
Minamoto clan | Minamoto no Yoritomo | Minamoto no Yoshitsune | Minamoto no Sanetomo | Minamoto no Masanobu | Minamoto no Tomonaga | Minamoto no Shitagō's | Minamoto no Shitagō |