noun, adverb
period of a year; for a year; throughout the year
Used as a noun or adverbially for a one-year span, often after a number as in 一年間, 三年間, or in phrases such as 年間を通じて.
彼は一年間、日本で働いた。
He worked in Japan for one year.
年間を通じて、この地域は雨が多
This region gets a lot of rain throughout the year.
noun, used as a suffix
during the era of; in the years of
Suffix attached to era, reign, or historical period names, as in 江戸年間 or 寛永年間. It is most common in historical or formal descriptions.
この寺は江戸年間に建てられたと伝わる。
It is said that this temple was built during the Edo years.