How to say “My umbrella is compact enough for a coat pocket, which is exactly why I keep losing it.” in Japanese
In Japanese
僕の傘、コートのポケットに入るくらいコンパクトなんだけど、だからこそしょっちゅうなくすんだよね。
Boku no kasa, kōto no poketto ni hairu kurai konpakuto nan da kedo, dakara koso shotchū nakusu n da yo ne.