Peace and Prosperity in Chinese / Japanese...

啟盛世開太平 means “To bring flourishing peace and security to the world (our current era).”

It's a wish that a new door leading to peace and prosperity could be opened to mankind.

Character and word breakdown:
啟 to open; to start; to initiate; to enlighten or awaken.
盛世 a flourishing period; period of prosperity; a golden age.
開 to open; to start; to turn on.
太平 peace and security; peace and tranquility; peace; tranquility.
I don't like to do breakdowns like this, as the words altogether create their unique meaning (encompassed in the main title above).

This proverb can be translated as the whole world at peace, peace and prosperity, peaceful and tranquil, peace reigns over the land, times of peace, peace and tranquillity, peaceful world, or from the Greek, times of halcyon.

Sometimes (rarely) written as 天下泰平 (variant 3rd character).

家內安全 is the Japanese way of saying “Family First.”

It's a Japanese proverb about the safety and well-being of your family and/or peace and prosperity in the household.

Some Japanese will hang an amulet in their home with these Kanji. The purpose is to keep your family safe from harm.

According to Shinto followers, hanging this in your home is seen as an invocation to God to always keep family members free from harm.

We were looking for a way to say “family first” in Japanese when this proverb came up in the conversation and research. While it doesn't say “family first,” it shows that the safety and well-being of your family is your first or most important priority. So, this proverb is the most natural way to express the idea that you put your family first.