How to say “There are five of us and the toothbrush holder only fits four, so mine lives in a glass.” in Japanese
In Japanese
うちは五人家族なのに、歯ブラシ立てには四本しか入らないから、私のはコップに立ててるの。
Uchi wa gonin kazoku na no ni, haburashitate ni wa yonhon shika hairanai kara, watashi no wa koppu ni tateteru no.