I’ve covered the Kounomiya Naked Man Festival in the past; Kounomiya is the place and shrine near Nagoya, which is known in Japanese as Hadaka Matsuri, Hadaka means naked, and matsuri means festival. Below is the bigger spectacle in Okayama covered by the BBC just yesterday. Ceremonies for the Nagoya Kounomiya festival starts from this week, but the main event is on the 28th Feb 2018 (Kikuko Nagoya). If you want to participate in the this festival, you
have less than 24 hours to can email Kikuko. Enjoy.
Correction: I just received an email alerting me to an error on a source website. The event is not 28th Feb 2017, but in 2018 (which is 13th January of the lunar year).