小山宙哉 has written at least 17 books. Their most popular book is 宇宙兄弟 1 with 4 saves with an average rating of 4.67⭐.
They are best known for writing in the genres Fiction and Manga.
Adventurous is their most common moods.
Series
37 primary booksAuthored 45% of series
宇宙兄弟 / Space Brothers is a 37-book series with 37 primary works first released in 2008 with contributions by Chuya Koyama and 小山宙哉.