沖おき縄なわ山やま芋いもMeaningsNoun1. water yam (Dioscorea alata); winged yam; purple yam (Rare)Kanji used沖open sea縄rope山mountain芋potatoComposed of沖おき縄なわOkinawa (city, prefecture)Noun山やま芋いもJapanese yam (Dioscorea japonica)Noun