spherical object / ball

not necessary to; don't have to

Expresses gratitude or relief for something that happened in the past, a choice made, etc.

If only ~

It's good / okay to... / is fine

baseball ground; baseball stadium

yakyuken or strip rock paper scissors (a version of Rock-Paper-Scissors where the loser has to remove an article of clothing, accompanied with a song and dance)

baseball player

baseball cap

(colloquial) current boyfriend