さんじゅう ゾーン30 LinksSentence search for ゾーン30Sentence search for ゾーンさんじゅうSentence search for ゾーン三十Edit in JMdict Noun1. 30 km/h zone (area in which the speed limit is 30 km/h)Other formsゾーン三十 【ゾーンさんじゅう】 Discussions Log in to talk about this word.