A box or drawer for storing money, used in shops, offices, or for personal savings.
店員が金箱からお釣りを取り出した。
The clerk took out change from the cashbox.
rich patron; financial supporter; income source
Figurative use: a person or entity that provides money, like a benefactor or a reliable source of income.
彼は地元の劇団にとって大切な金箱だ。
He is an important financial supporter for the local theater company.
Compound of 金 (かね, 'money') and 箱 (はこ, 'box'), with rendaku voicing of はこ to ばこ.