mythical island of women; isle of women
Refers to a legendary island inhabited solely by women, appearing in classical Japanese literature and folklore.
Nyogo-no-shima is a legendary island that appears in old tales and ancient topographies.
Extended modern usage for any place or event where only women are present; often used humorously or figuratively.
There isn't a single man at today's gathering; it's like an isle of women.
Irregular okurigana variant; less common but still encountered.
The term is composed of 女護 (nyogo, 'woman-protecting') and 島 (shima, 'island'). The exact origin is uncertain, but it is associated with medieval Japanese legends of distant islands inhabited only by women.