A Japanese Phrase for Saying you want to open a bank account: "口座を開きたいのですが。"

"口座を開きたいのですが。" means "I'd like to open an account?" and it's the basic Japanese expression used for saying you want to open a bank account. It's very handy at banks and post offices. To answer, you can say something like "かしこまりました、身分証明書をお願いします。" (Certainly, I'll need some ID, please). You can keep the conversation going by reacting with something like "はい、パスポートです。" (Yes, here's my passport).