I was mocking up a control panel for a makerspace vacuum former as a potential project (didn’t end up happening), and I put in controls for Celsius, Kelvin, Farenheit, and Rankine. Then I wanted a unit more ridiculous than Rankine, so I invented the Nihon. Zero Nihon is the freezing point of Nihonium, and 100 is the boiling point. Except it’s the theoretical point, because Nihonium has too short of a half life to actually study.