Ah, yes, counters are essential in Japanese - so great idea to start up a thread K73SK-san!
Okay, let's begin.
:arrow: __HOUR counter "O'clock" - 時 じ (~ji)__
The hours of the day are indicated with a number, such as *ichi*, *ni*, or *san*, plus the suffix *~ji*. So _"One o'clock"_ is *Ichi-ji* - _"Two o'clock_" is *Ni-ji* - and _"Three o'clock"_ is *San-ji.*
:arrow: __MINUTES__ of the hour are indicated with the suffix *~fun* or *~pun* (*or *~ppun* like *ippun* - _"one minute"_)
:arrow: __SECONDS__ get the suffix *~byō* such as *Ichi-byō* _"One second"_ and *Go-byō* _"Five seconds"_
:idea: Now, onto the suffix *~kan*...
*~kan* indicates _"period/time span"_ and is used to express duration of
__~years__ *(~nenkan)* - for example: *Roku nenkan* _"(a period of) 6 years"_
__~months__ *(~ka getsukan)* - for example: *Ni ka getsukan* _"(a period of) 2 months"_
__~weeks__ *(~shūkan)* - for example: *San shūkan* _"(a period of) 3 weeks"_
__~days__ *(~nichikan)* - for example: *Go nichikan* _"(a period of) 5 days"_
AS WELL AS shorter periods:
__~hours__ *(~jikan)* - for example: *Jū jikan* _"(a period of) 10 hours"_
__~minutes__ *(~funkan/~punkan)* - for example: *Jūgo funkan* _"(a period of) 15 minutes"_
__~seconds__ *(~byōkan)* - for example: *Nijū byōkan* _"(a period of) 20 seconds"_
So, just remember, when there's a *~KAN* attached to a time suffix, it means _"period"_ or _"time span"_. This *~kan* is always required when talking about "hours" but it can be dropped when expressing durations of minutes and seconds.
For example, you ran the marathon in _*11:49:32*_ _(11 hours and 49 minutes and 32 seconds)_ and in Japanese... *Jūichi-jikan yonjūkyū-fun(kan) sanjūni-byō(kan)* :shock: