Hardships and Joys in Chinese / Japanese...

辛酸甘苦 is a Japanese proverb that speaks of the “hardships and joys” of life.

Some other translations include:
Tasting the sweets and bitters of life.
Being well-versed in the ways of the world (having seen much of life).

This is the Japanese “for better or worse” when speaking of life.

同甘共苦 is a Chinese proverb that talks of “shared delights and common hardships.”

This can be translated and understood in a few different ways, including...
To share life's joys and sorrows.
For better or for worse.
Through joys and sorrows of life.
Through all life's ups and downs.
To go through thick and thin.
To stick together through thick and thin.
To share the joys and sorrows of life.
To share pleasures and pains.
To partake in each other's joys and sorrows.
To take “for better or for worse.”