: She was frequently featured in amateur-style or "hidden camera" themed productions, which are a staple of the Japanese adult video market.
: Another individual with this name is a nurse aide (nurse assistant) who has contributed to hospital newsletters, such as for Okayama Kyoritsu Hospital , sharing personal essays about her workplace experiences.
Ikuko’s narrative utility is often discussed in terms of logistics—she is the reason Touko enters Yuu’s domestic sphere. But her role is far more symbolic than mere plot convenience.