Ryōsuke Nanasaki is a Japanese LGBT activist and author, recognized as the creator behind the original memoir that served as the basis for the manga Until I Meet My Husband. Born in Hokkaido in 1987, Nanasaki grew up in a conservative environment where he struggled with his identity as a gay man from a young age. After graduating from high school, he moved to Tokyo, where he began to find community and eventually became a prominent advocate for LGBT rights. His professional activism includes founding the Edogawa LGBT Community group in September 2015 and launching Juerias LGBT Wedding, a wedding planning company, in April 2016. These efforts contributed to the Edogawa ward in Tokyo officially recognizing same-sex partnerships. In October 2016, Nanasaki and his husband made history by holding the first religiously recognized same-sex wedding in Japan at Tsukiji Hongwanji Temple.

As an original creator, Nanasaki is best known for his autobiographical essay collection, Until I Meet My Husband. This work chronicles his life journey, from his painful experiences with bullying and self-hatred in elementary and middle school to his unrequited crushes and awkward first experiences with dating. The essays are noted for their raw honesty, detailing the full spectrum of his personal life, including toxic relationships, mistakes, and intimate encounters, without self-censorship. He has stated that his goal in writing the memoir was to present the raw, uncut truth of queer identity, emphasizing that gay people experience happiness and make mistakes like everyone else.

The success of the original essay collection led directly to a manga adaptation, also titled Until I Meet My Husband, published by Seven Seas Entertainment. While Nanasaki is the credited writer and original creator of this manga, the illustration was handled by artist Yoshi Tsukizuki, a known creator in the boys love genre. The manga adaptation distills the key events of Nanasaki’s life into a more visual and accessible format, though reviewers have noted that it omits some of the more complex and darker details present in the original essays. This body of work, both the prose memoir and the manga, is significant as one of the first major commercially published accounts of a gay man’s life in Japan, marking a notable moment in the publishing industry for queer nonfiction. Through his writing, Nanasaki has become a significant figure for his contribution to LGBT representation in Japanese media, aiming to create a world where everyone has the option of getting married.