10 PM (22:00). A late evening hour often associated with store closing times, last trains, or before-bed routines.
スーパーは２２時に閉まります。
The supermarket closes at 10 PM.
終電はだいたい２２時半前後です。
The last train is around just before or after 10:30 PM.
子どもは普段２２時には寝ます。
The child usually goes to bed at 10 PM.