Here are three useful phrases you can use today when speaking Japanese. Learn how to say, "Please speak slower," "Please repeat," and -- when all else fails -- "I don't understand."
もっとゆっくり話してください。
motto yukkuri hanashite kudasai
Please speak a little slower.
もう一回言ってください。
mou ikkai itte kudasai
Please say that again.
分かりません。
wakarimasen.
I don't understand.