Translation guide
A melodica is a free-reed instrument similar to a pump organ or harmonica, with a keyboard on top and a mouthpiece to blow air through. In Japanese, it is commonly called メロディカ or 鍵盤ハーモニカ, and is widely used in music education.
melodica (instrument)
Referring to the melodica as a musical instrument, especially in educational or casual contexts.
The most common Japanese term for melodica, literally 'keyboard harmonica'. Used in schools and by manufacturers.
I played the melodica in music class.
A direct loanword from English, commonly understood but less formal than 鍵盤ハーモニカ. Often used in product names or casual conversation.
I bought a new melodica.
A brand name (by Yamaha) that has become somewhat genericized, similar to 'Kleenex' for tissues. Recognizable but less neutral than 鍵盤ハーモニカ.
I played a simple tune on the melodica.