Despite the eye-catching name, the participants who thronged a temple for the 2020 Hadaka Matsuri were not entirely nude: they wore traditional loincloths called fundoshi and socks known as tabi.

"Washoi! Washoi!" they yell - let's go, let's go. It is scene that has barely changed in the 1,250 years the Hadaka Matsuri, or the Naked Festival, has been taking place at the Konomiya Shrine ...