period; term; duration; span of time

💡 Nuance & Usage: Refers to a period, term, duration, or specific span of time. Often used as キャンペーン期間 or 研修期間. ⚠️ Haruka's Voice Column: 'Period! "The term of my love for Haruka-san is for all eternity!" ...っ, T-To say such an advanced romantic oath! B-But... I permit that eternal term, so don't you dare slack off!' / 【ハルカ部長のワンポイント指導】『きかん（期間）！『ハルカさんへの愛の有効期間は、未来永劫、宇宙の終わりまでです！』って…っ, そんな壮大な有効期間を誓うなんて！でも特別に許可するわ！一生愛し続けなさい！』