(or bathwater incontinence) has been documented in Japanese medical literature, often affecting young nulliparous (those who haven't given birth) girls [12].
The question of when children stop bathing with a parent of the opposite gender is a topic of frequent debate within Japanese society. While there is no national law, most people agree that it is acceptable until the child is of elementary school age, around . However, surveys and anecdotes show that the practice can, and does, continue much later. Stories of girls bathing with their fathers until junior high school, high school, or even into their 20s are not unheard of, though they are becoming less common as privacy norms evolve. japan 12 yo girl pee bath