Okinoshima (沖ノ島) is an island in Fukuoka prefecture of Japan.
In 2017 the island was awarded UNESCO heritage status.
It is very difficult to get permission to visit this island, with the custodians insisting that "people shouldn't visit out of curiosity". Additionally there is a ban on females visiting at all.
If you get permission to visit, then a purifying ceremony must be undertaken by stripping naked and walking through the sea (called misogi).
Primary administrative division