The ritual on the night before is called a 'Funeral wake,' 'Prayer on the night before' and so on rather than 'Tsuya' which means keeping a night watch for the deceased to perform an incantation.
この前夜の式典は、呪術的な必要から遺体を不寝番することを意味する「通夜」を避け、「前夜式」「前夜の祈り」などと呼ぶ。