核不拡散 かくふかくさん Meanings Noun nuclear nonproliferation Kanji 核 nucleus. Read as カク. 不 un- 拡 expand. Read as カク. 散 scatter. Read as サン. Words containing 核不拡散 核不拡散条約 (かくふかくさんじょうやく) Nuclear Non-Proliferation Treaty Jinuma: Japanese Dictionary · Word lists