“Handwritten letter” in Japanese
Short answer
Handwritten letter in Japanese is “手書き文字” (tegakimoji). Full meaning: handwritten letter, handwritten character.
Other ways to say “Handwritten letter” in Japanese
親書
shinsho official letter (from the Emperor, Prime Minister, etc.), personal message; handwritten letter, autograph letter
手札
tefuda one's hand; name tag, nameplate, business card; handwritten letter, mail, correspondence
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