Uketsu is an enigmatic presence on YouTube and an author specializing in horror and mystery. He always appears in videos wearing a white mask and black body stocking, with his voice digitally distorted. His true identity is unknown. His novels Strange Pictures, Strange Houses, Strange Buildings were massive hits in Japan, where he lives.

Jim Rion has lived in Yamaguchi Prefecture, Japan since 2004. He began professionally translating Japanese to English in 2015, primarily in cultural and travel fields. From 2018, he began working with local sake brewers on international expansion, and in 2022 Stone Bridge Press published his book Discovering Yamaguchi Sake, a guide to all the sake breweries in his home prefecture.

He has published translations of two horror/Cthlulhu mythos books with (now defunct) publisher Kurodahan Press, and from 2022 began working with Pushkin Vintage on translating Japanese crime and mystery fiction into English. The first work, The Devil’s Flute Murders by Yokomizo Seishi, was published in 2023. His translation of Strange Pictures by Japanese horror/crime writer Uketsu, is scheduled for publication in January 2025.