Tsuya were traditionally held throughout the night, but in modern times they are usually shortened to a half-tsuya, which is held from around six to nine pm, open to all mourners and having the priest reading from the Buddhist script only once.
通夜は本来、夜通しで行うとされるが最近では夜6時ごろから9時ごろまで一般の参列者を招き僧侶の読経も1回のみという形の『半通夜』にする場合が多くなってきている。