Sachiko Kashiwaba is a prolific writer of children's and young adult fantasy whose career spans more than four decades. Her works have garnered the prestigious Sankei, Shogakukan, and Noma children's literature awards, and her novel The Marvelous Village Veiled in Mist influenced Hayao Miyazaki's film Spirited Away. Her works have recently been animated as the films The Wonderland and The House of the Lost on the Cape. Her novel Temple Alley Summer, illustrated by Miho Satake and translated by Avery Fischer Udagawa, won the American Library Association's 2022 Mildred L. Batchelder Award, was a July/August 2021 Kids' Indie Next Pick, and a Junior Library Guild Gold Standard Selection. She lives in Morioka, Iwate.

Yukiko Saito is a graphic designer and illustrator originally from Aomori, Japan. She studied textile arts in the fine arts and crafts teacher training program within the Faculty of Education, Iwate University. She lives in Iwate Prefecture.

Avery Fischer Udagawa grew up in Kansas and studied English and Asian Studies at St. Olaf College in Minnesota. She holds an MA in advanced Japanese studies from the University of Sheffield. She has studied at Nanzan University, Nagoya, on a Fulbright fellowship, and at the Inter-University Center for Japanese Language Studies, Yokohama. She writes, translates and works in international education near Bangkok, where she lives with her bicultural family.