よっか ４日 Common word JLPT N5 Wanikani level 4 LinksSentence search for ４日Sentence search for よっかSentence search for 四日Kanji details for 日Edit in JMdict Noun1. 4th day of the month７月４日はアメリカではきねん記念すべきひ日だ。July 4th is a red-letter day in America.Noun2. four daysなが長くても４日しかま待てませんよ。I can wait four days at the longest.Other forms四日 【よっか】 Discussions Log in to talk about this word.