Waning Crescent Moon - kagen no hangetsu

…Because the age of the moon is approximately 15 days, the night of the full moon is called the 15th night, and appears in the eastern sky as the sun sets in the west. The moon then rises later, and the waning quarter moon appears in the eastern sky at midnight and reaches its zenith in the morning. When it reaches the waning quarter and takes on a crescent shape, it appears in the eastern sky before sunrise, then returns to being a new moon. …

*Some of the terminology explanations that refer to the "waning quarter moon" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…月齢がほぼ15日なので，満月の夜は十五夜と呼ばれ，太陽が西に沈むころに東の空に現れる。その後月の出の時刻はさらにおくれ，下弦の半月は夜半に東の空に現れ，朝方南中する。さらに下弦で三日月形になると日の出前に東の空に現れ，また新月にもどる。…

※「下弦の半月」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報