“Pun” in Japanese is called “dajyare” (駄洒落), but many call it an “oyaji gag - old man’s joke.” I can’t help myself. Just came home from a walk with my wife when a crow (karasu) darted just in front of our faces, and I said, “Why are they called crows? Because they’re 黒! (kuro)” and “Why are their nests always empty? Because they’re 空巣! (karasu)” For this, I was deservedly slapped in the face. - William