It is customary for Japanese to be punctual. As Japanese are especially concerned about not being late, most have naturally acquired this habit. For example, in companies and public institutions, and for meetings with others, it is considered common sense to “be prompt.” Though it’s possible to turn up late for a date with someone close to you, it’s always necessary to text to say you’ll be late.
If a train arrives even one-minute later than scheduled, Japanese railway companies announce their apologies over the PA. Moreover, Shinkansen (bullet train) arrival and departure times are timed within 15 second periods.