A letter sent by a reader to a newspaper or magazine (a letter to the editor), often containing complaints or opinions.
新聞に投書を出したが、掲載されるかどうかは編集部次第だ。
I sent a letter to the newspaper, but whether it will be published is up to the editorial department.
読者の投書が一面に掲載され、話題になった。
A reader's letter was published on the front page and became a topic of discussion.
投書欄には苦情や要望が多く寄せられる。
The letters column often receives many complaints and requests.
A contribution or submission to a newspaper, magazine, etc. (a reader's submission or contribution).
地元紙に地域の問題について投書を寄せた。
I submitted a contribution about a local issue to the regional paper.
投書はまず編集部で内容を確認されることが多い。
Contributions are often checked by the editorial department first.
最近、雑誌に掲載された投書がSNSで拡散した。
Recently, a contribution published in a magazine spread on social media.