What is it called when you stay up all night?

The term for staying up all night is "徹夜" (tetsuya) in Japanese. It is composed of the kanji characters "徹" (徹, tsura), meaning "through" or "all the way," and "夜" (夜, yoru), meaning "night." Together, they refer to the action of staying awake and continuing to do something throughout the entire night until the following day.