1A cooperative financial institution (credit union) that provides deposits, loans, and other banking services primarily for local residents and small businesses.
地元の信用金庫に口座を作った。
I opened an account at the local credit union.
信用金庫は地域の中小企業に融資を行っている。
The credit union provides loans to local small and medium-sized businesses.
信金（信用金庫）はATMの手数料が安いことがある。
Credit unions (shinkin) sometimes have lower ATM fees.