Another bit of old wisdom from the Japanese children’s show Nihongo de asobo:
makanu tane wa haenu
Basically, this means: “if you don’t sow anything, seeds won’t grow.”
My father-in-law who is well into his 70’s now recognized this proverb right away, so it seems well know at least to the older generation.
In other words: nothing ventured, nothing gained.
P.S. Modern Japanese verbs and adjectives have a negative ending of “nai” (ない), but in older Japanese, the negatice ending is usually “nu” (ぬ).