Yunana (ゆなな) is the author named in the PR TIMES announcement for 205 Showa-Era Love Hotels Visited Alone by a Woman in Her 20s.
Update
A Woman in Her 20s Visits More Than 200 Showa-Era Love Hotels Alone!
Nostalgic for the Showa generation and new to the Heisei generation, this cultural-heritage exploration chronicle follows 205 hotels.