The tokin is a small, black, box-shaped hat traditional to Japan, which yamabushi of shugendō wear on their foreheads. The tokin has been worn since the Kamakura period or the Muromachi period.
The appearance of yamabushi. Various items which yamabushi usually wear and bear are shown in this image, such as tokin, suzukake, yuigesa, horagai, kyahan, oi, katabako, irataka nenju and shakujō.
Statue of a karasu-tengu as a yamabushi wearing a tokin
Tengu are a type of legendary creature found in Shinto belief. They are considered a type of yōkai or kami. The Tengu were originally thought to take the forms of birds of prey and a monkey deity, and
Tokin (headwear)
…are safe in the deep forests. This style was established in the Kamakura or Muromachi period, and the contemporary yamabushi keep this tradition today. Tengu, dangerous yet protective spirits of the mountains and forests, are depicted in the style of yamabushi, and are also shown wearing the tokin. The tokin…
Kobayakawa Takakage debating with the tengu of Mount Hiko, by Yoshitoshi. The tengu's nose protrudes just enough to differentiate him from an ordinary yamabushi.
A man wearing a Tengu mask representing the deity Sarutahiko at the Menkake Gyōretsu festival in Kamakura.
Tengu as a kite-like monster, from Toriyama Sekien's Gazu Hyakki Yakō. Text: 天狗/てんぐ (tengu)
Iga no Tsubone confronts the tormented spirit of Sasaki no Kiyotaka, by Yoshitoshi. Sasaki's ghost appears with the wings and claws of a tengu.