While the standard Hanako legend does not involve bathing, it establishes the cultural trope of "child + school bathroom = horror/gore." Over the years, as stories are translated and embellished online, details change. It is plausible that some versions of these ghost stories or derivative works of fiction ( bijuaru-kei art) have warped into the "pee bath" idea. A story that was originally about a ghost in a toilet might have been twisted into a fictional snuff story about a different form of torture in a bath. This misinformation is then spread via image boards and social media, where shocking, false claims travel fast without fact-checking.
In Japanese home architecture, the toilet and the bathtub/shower are almost always located in completely separate rooms. This structural separation reflects the deep cultural emphasis on separating "dirty" activities (using the restroom) from "pure" activities (soaking and relaxing in the tub). The Cultural Takeaway japan 12 yo girl pee bath
When a girl turns 12 in these prefectures, she is no longer permitted to enter the men's bath with her father. This regulation is not a secret "ceremony" or a "coming-of-age" ritual, but a straightforward public health and safety rule designed to balance family needs with the privacy and security of all bathers. While the standard Hanako legend does not involve
: Japanese students, including those in junior high school (age 12+), are responsible for cleaning their own school facilities, including the bathrooms. This practice is intended to instill respect for public spaces and shared responsibility. This misinformation is then spread via image boards