Genki

Genki is a 5-book series with 5 released primary works first released in 1999 with contributions by Eri Banno, Yoko Ikeda, Yutaka Ohno, Chikako Shinagawa, Kyoko Tokashiki, Eri;Ohno Yutaka Banno, and 坂野 永理; 坂根 庸子; 渡嘉敷 恭子; 大野 裕; 品川 恭子.