the early bird catches the worm
Proverb encouraging early rising; literally 'waking early brings a profit of three mon' (a small but worthwhile gain).
They say the early bird catches the worm, so let's get up early tomorrow.
A more common variant with the same meaning; uses 早起き (early rising) instead of 朝起き (morning waking).
A traditional Japanese proverb. The exact origin is uncertain, but it reflects the Edo-period idea that waking early yields a small but tangible benefit.