望月: a surname

持ち遊び:

(slang, emphatic) Alternative form of 勿論 (mochiron)

the songs someone can sing / someone's iconic song

the ability to keep someone full after consumption

mochi with zunda filling, a specialty of the Tōhoku region

(archaic, possibly obsolete, historical) in ancient Japan prior to the Taika Reform, a governor appointed by the emperor to carry out imperial policies in the provinces

"bottom mochi": the result of falling backwards and landing on one's rear

countenance; facial expression

Happy New Year!