不文憲法 ふぶんけんぽう Meanings Noun uncodified constitution; unwritten constitution See also: 成文憲法 (せいぶんけんぽう). Kanji 不 un-. Read as フ. 文 text. Read as ブン. 憲 constitution. Read as ケン. 法 law. Read as ホウ. Jinuma: Japanese Dictionary · Word lists