返信用封筒 へんしんようふうとう Meanings Noun self-addressed stamped envelope; SASE Kanji 返 give back. Read as ヘン. 信 trust. Read as シン. 用 use. Read as ヨウ. 封 seal. Read as フウ. 筒 tube. Read as トウ. Example sentences 返信が必要な場合は、返信用封筒に切手を貼って同封してください。Include a stamped addressed envelope if you want a response. Jinuma: Japanese Dictionary · Word lists