Courage to Do What is Right in Chinese / Japanese...

義を見てせざるは勇なきなり is a Japanese proverb that means “Knowing what is right and not doing is a want of courage.”

I've also seen it translated as:
To see what is right, yet fail to do so, is a lack of courage.
To know righteousness, but take no action is cowardice.
You are a coward if you knew what was the right thing to do, but you did not take action.
Knowing what is right without practicing it betrays one's cowardice.

Note: Because this selection contains some special Japanese Hiragana characters, it should be written by a Japanese calligrapher.

見義勇為 means the courage to do what is right in Chinese.

This could also be translated as “Never hesitate to do what is right.”

This comes from Confucian thought:
Your courage should head in an honorable direction. For example, you should take action when the goal is to attain a just result as, without honorable intent, a person’s gutsy fervor can easily lead them astray.

One who flaunts courage but disregards justice is bound to do wrong; someone who possesses courage and morality is destined to become a hero.

Some text above paraphrased from The World of Chinese - The Character of 勇

See Also:  Work Unselfishly for the Common Good | Justice | Bravery

義無反顧 is a Chinese proverb that can be translated in a few different ways. Here are some examples:

Honor does not allow one to glance back.
Duty-bound not to turn back.
No surrender.
To pursue justice with no second thoughts.
Never surrender your principles.

This proverb is about the courage to do what is right without questioning your decision to take the right and just course.