Chindogu is a Japanese expression, named after Yadayada Sapetoku who was known for the dazzling amounts of time and energy he spent to be creative useless. It has everything to do with uselessness and virtuosity. It can be a noun, a verb, an adjective, an adverb, or a yet-to-invent grammatical item. Well, let's start with the applications that already have been research, shall we?