Don't count your chickens before they hatch

tʃaɪniːzle̞tə ɽä nɯᵝ tʃaɪniːzle̞tə no̞ tʃaɪniːzle̞tə tʃaɪniːzle̞tə tʃaɪniːzle̞tə

In Japanese 捕らぬ狸の皮算用。

This proverb literally means 'calculating with the skin of a raccoon dog you haven't caught,' similar to the English proverb.