open letter
公開状
Epistolary poem
List of open letters by academics
Persuasive writing
Polemic
White paper
/suto3/google.iconopen letter
/suto3/Google画像検索.iconopen letter
/suto3/Google定義検索.icon open letter
/suto3/wikipedia.iconopen letter
/suto3/weblio.icon open letter
/suto3/kotobank.icon open letter
/suto3/jisho.icon open letter