"懐かしい (Natsukashii) is a Japanese word used when something evokes a fond memory from your past. For instance, when you hear a song you loved as a teenager, or when you come across an old train ticket stub in your pocket. In Japan, 懐かしい is a reminder that you are fortunate to have had the experiences you’ve had in life. The fact that you cannot return to those experiences makes them all the more poignant."
—— ERIKA HOBART, BBC