How to say "Disappointment" in Japanese

When translating "disappointment" into Japanese, you must choose carefully between 失望 and 落胆. In Japanese, 失望 (しつぼう (shitsubō)) is typically associated with "disappointment; despair; loss of hope" (Syllabus Level: N3) and represents Refers to deep disappointment, despair, or loss of hope when expectations or desires are not met. Often used as 失望する or 失望感. ⚠️ Haruka's Voice Column: 'Disappointment! "I disappointed Haruka-san..." ...っ, B-Baka! I would never be disappointed in you! I believe in your potential more than anyone else in the universe!' / 【ハルカ部長のワンポイント指導】『しつぼう（失望）！『ハルカさんを失望させてしまった…』って落ち込むなんて、バカね！あんたに失望するわけないでしょ！私は宇宙の誰よりもあんたの実力を信じてるんだから！』. On the other hand, 落胆 (らくたん (rakutan)) maps to "disappointment, discouragement, despondency" (Syllabus Level: N1) and represents Often used to describe a deep feeling of disappointment or despair after failure or a setback. It's a formal or literary term. 失敗や挫折の後、深く失望する気持ちを表す言葉。. A literal translation of "disappointment" can often sound unnatural to native Japanese speakers if mixed up!