Important Words to Know...
Asking for time in Japanese is as simple as asking:
今何時ですか？Ima nan ji desu ka?
What time is it now?
Understanding or giving the answer is a bit trickier.
First of all, it is imperative to learn the different time-related expressions. If you’re already familiar with Japanese numbers, it should be fairly easy to memorize.
1：一時：いちじ：ichi ji (one o’clock)
2：二時：にじ：ni ji (two o’clock)
3：さんじ：san ji (…)
11：十一時：じゅういちじ：juu ichi ji
12：十二時：じゅうにじ：juu ni ji
1: 一分：いっぷん：ippun (one minute)
2:二分：にふん：ni fun (two minutes)
3:三分：さんぷん：san pun (...)
15:十五分：じゅうごふん：juu go fun
There are a few things, a few distinctions which are important to keep in mind however.
Minute (分) has two different ways of being pronounced. It can either be pronounced ふん (fun) or ぷん(pun), depending on the numeral it is used with.
If used with the numbers 2, 5, 7 or 9, minute is pronounced ふん (fun)。
If used with the numbers 1, 3, 4, 6, 8 and 10, minute is pronounced ぷん (pun)。
Although four is pronounced よ (yo) when referring to the hour (o’clock), it is pronounced よん (yon) when referring to the minute.
When referring to half an hour, the term はん(han) is used, which means “half". It is also possible to say thirty minutes: さんじゅうっぷん (san juu ppun) but is longer and less common.