one hour
Standard noun for a duration of one hour. Often used with particles like に (per hour), で (in one hour), or 前/後 (one hour before/after).
ここから駅まで歩いて一時間かかります。
It takes one hour to walk from here to the station.
一時間後にまた来てください。
Please come back in one hour.
The meeting took one hour.
I can write this report in one hour.
Please take the medicine every hour.
I waited a whole hour for the train.
I took a walk for about an hour.
I arrived one hour before the meeting.