The strong will protect the weak and, in return, the weak will serve the strong.
More Japanese Proverbs:
Pick your wife in the kitchen.Japanese
Kind hearts are better than fair faces.
Japanese
If the fountainhead is clear, the stream will be clear.
Japanese
If you understand everything, you must be misinformed.
Japanese
It is a blessing in disguise.
Japanese
He who is always right will never get round the world.
Japanese