The Japanese word for year is
年

ねん - nen

Japanese Definition

year
1. 名詞. 年（約365.24日)
2. 名詞. ある天体が別の天体に対して公転する周期
One Mars year is the time it takes Mars to go once around the Sun: equivalent to XX.xx Earth years
3. 名詞. （暦法上の）年
A normal year has 365 full days, but there are 366 days in a leap year.
I was born in the year 1950
This Chinese year is the year of the Rooster
4. 名詞. 12ヶ月
We moved to this town a year ago.
5. 名詞. 年度
During this school year I have to get up at 6:30 in the morning to catch the bus.
6. 名詞. （口語）長い時間
it took years for the bus to come
7. 名詞. 学年
Everyone in year 2 Medicine must....
The exams in year 12 at high school are the most ....

年
1. counter. years
2. n. a year
年に一度 - once a year
3. suffix. a grade, a school year
彼は中学２年だ。 - He's in the second year in junior high school.
4. suffix. a year
2008年に橋を建設し始めるようだ。 - It seems like they will start constructing the bridge in (the year) 2008.