Hiroko Yoda and Matt Alt are a husband and wife team who run a Tokyo-based translation company that specializes in producing the English versions of Japanese video games, comic books and literature. Alt is the co-author of Super #1 Robot (2005), a detailed photo-history of 1970s Japanese robot toys. Alt and Yoda are also co-authors of Hello, Please! Very Helpful Super Kawaii Characters From Japan (2007), a book about Japanese cute character culture. They also happen to have firsthand yokai experience, having appeared as extras in the Takashi Miike film The Great Yokai War (2005).
Illustrator Tatsuya Morino became the assistant to Shigeru Mizuki, one of Japans most beloved manga artists, when he was fresh out of high school. After going independent, he illustrated the graphic novel Kibakichi, which was turned into a pair of successful movies of the same name. He also works as a character designer, with credits including the Gainax video game Yokai Family and the web comic Trip Trek. His comic Legentail Sennenta is currently serialized in Kadokawa Shotens monthly comic collection Kero Kero Ace.