noun
11 PM; 23:00
Used in 24-hour time notation; equivalent to 11 o'clock at night.
今夜の番組は２３時から始まります。
Tonight's program starts at 11 PM.
２３時を過ぎると電車の本数が減ります。
After 11 PM, the number of trains decreases.
Same time as ２３時, but expressed in 12-hour format with 午後 (PM).
Compound of 二十三 (にじゅうさん, twenty-three) and 時 (じ, hour), following standard Japanese number + counter formation.