(sometimes offensive) part of Japan adjacent to Sea of Japan

(Internet slang) secret personal account (on social media, especially Twitter and Instagram (finsta), as opposed to one's openly used account)

(music) syncopated beat, an accented part of a rhythm marked by syncopation

actual and hidden

the futokoro, the pocket-like space within the front of a kimono above the obi / the inside of the futokoro / the inside of one's heart or mind

back door

underhanded dealings

underbelly of society

Watch yourself, be careful, literally, "keep your health" / take care (used when parting)

police dog