1.
number of years; duration in years
The count or span of years involved in something, such as a period of service, the age of a building, or the time required to complete a process.
The more years pass since a building was constructed, the more repairs become necessary.
A compound of 年 (year) and 数 (number, count). Used when referring to how many years something has lasted, how long something takes, or the duration of an activity measured in years. Common in formal and administrative contexts such as employment records, real estate, and certification requirements.
Common collocations
- 勤続年数: years of continuous service
- 経過年数: elapsed years
- 耐用年数: useful life (of equipment or buildings)
- 年数が経つ: years pass
- 年数を重ねる: to accumulate years (of experience)