Gachapon: Japanese vending machines that sell surprise toys inside capsules. Their name imitates the sounds of turning the crank ("gacha") and the capsule dropping ("pon"). This concept of obtaining random items was later adapted into video games as the gacha mechanic, present in titles like Genshin Impact, where in-game currency (sometimes real money) is spent to obtain random characters or items.
Onigashima: A mythical Japanese island whose name means "Island of the Oni" (ogres or demons). It is famous as the central setting of the Momotarō folktale, where the hero travels there with a dog, a monkey, and a pheasant to defeat the demons terrorizing his village. It is often depicted as a mountain shaped like a skull or with horns, evoking the image of a demon.
