しそん子孫shison
1.

Individuals who are born from a direct line of ancestry, including children and grandchildren, as well as subsequent generations linked by blood.

2.

People who exist in later periods and are connected by lineage to their forebears, representing a continuation of a family or ancestral line.

Example:

合衆国は長い間「るつぼ」として知られているが、それは国民のほとんどが移民の子孫だからである。

しそんはんえい子孫繁栄shisonhan'ei
1.

The flourishing and continuation of future generations, ensuring the survival and growth of one's lineage.

2.

The successful reproduction and growth of descendants, contributing to the strength and vitality of a family line.

3.

The process through which progeny thrive and expand, maintaining cultural or genetic heritage across time.

4.

The concept of nurturing and supporting offspring to ensure they lead prosperous lives and carry on familial legacies.