十三夜 じゅうさんや Meanings Noun 13th day (of the moon); the night of the 13th day of 9th lunar month Kanji 十 ten. Read as ジュウ. 三 three. Read as サン. 夜 night. Read as ヤ. Words containing 十三夜 二十三夜 (にじゅうさんや) 23rd night of a lunar month (esp. 8th month) Jinuma: Japanese Dictionary · Word lists