Ittan-momen

[1] According to the Ōsumi Kimotsukigun Hōgen Shū (大隅肝属郡方言集), jointly authored by the locally born educator Nomura Denshi and the folkloricist Kunio Yanagita, at evening time, a cloth-like object about 1 tan in area (about 10.6 metres (35 ft) in length and 30 centimetres (12 in) in width) would flutter around attacking people.

The program suggested that when a white or bright objects move in the darkness, a positive afterimage optical illusion would leave a trail due to movement, causing soaring things in the forests at night such as musasabi to be seen as longer than they actually are, and thus mistaken as ittan momen.

[12] This manga depicted them as speaking a Kyushu dialect, having good-natured personalities, and having a unique look while flying, which raised their fame and popularity despite their original legend of attacking people.

[14][15] In Mizuki's birthplace, Sakaiminato, Tottori Prefecture, they ranked number 1 in the "First Yōkai Popularity Poll" held by the tourism association.

[1] In the 2020 anime adaptation of the In/Spectre ("Kyokō Suiri") novels, an ittan momen drawn in the Mizuki style, flies out from under the skirt of the female protagonist Kotoko.

[2] The musasabi would glide through the air along forest streets at night and cling to people's faces in surprise, so it is theorized that they are thought to have inspired a yōkai like this.