いい年をして[iitoshiwoshite] (in spite of) being old enough to know better
亥年[idoshi] year of the boar
一箇年[ikkanen] one year
一周年[isshuunen] one full year
一年以内に[ichineninaini] within a year

一年間[ichinenkan] (period of) one year
一年生[ichinensei] annual (plant)
一年草[ichinensou] annual (plant)
一年ぢゅう[ichinenjuu] all year round
一両年[ichiryounen] (a) year or two

鍬入れ式[kuwaireshiki] ground-breaking ceremony
オギノ式[oginoshiki] Ogino method
サイクルアンドライド方式[saikuruandoraidohoushiki] cycle and ride system
シーアンドエア方式[shiiandoeahoushiki] sea and air system
シーリング方式[shiiringuhoushiki] ceiling system

シップエア方式[shippueahoushiki] ship air system
スキャンロン方式[sukyanronhoushiki] Scanlon plan
違式[ishiki] informality
一括式[ikkatsushiki] batch mode
一式[isshiki] complete set