一年・1年|いちねんichinen
ひととしhitotoshiひととせhitotose
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Which spelling to use
一年一年 is the most common written form and the default choice for beginners. It uses kanji only.
1年1年 is a less common written variant using numerals and Latin characters. Beginners should choose 一年 instead.
Definitions
- nounone year; some time ago
Synonyms & antonyms
- Synonym年間ねんかんNeutralDenotes the span of a year and mostly appears in compounds such as 「年間計画」; 「年間を通して」 is also possible. More statistical in tone than 「一年」.
- Related年度ねんどNeutralAn institutional year — fiscal or school, as in 「2025年度」 — with start and end set by the system; 「一年」 is a one-year span or the calendar year from January to December.
- Related年中ねんじゅうNeutralAll year round, as in 「年中無休」, stressing unbroken continuity through the year.
Use 「一年」 for a one-year duration, as in 「一年間」; pick 「年度」 for a fiscal or school year and 「年中無休」 for no days off all year.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only
Japanese definitions
Kanji in this word
See also


