書かき留とめ郵ゆう便びんMeaningsNoun1. registered mail; registered postKanji used書write留hold in place郵mail便convenienceComposed of書かき留とめregistered mail; registered post; registration (of mail); (putting on) record; writing down; noting down; registryNoun郵ゆう便びんmail service; postal service; mail; post; postal matter; postal itemsNoun