I love salmon.

Every year, many fish gather in this river for spawning.

Frogs spawn when spring comes.

He researched his family tree to go back through his ancestors' history.

The culture of the Korean Peninsula is very unique, and its history dates back to ancient times.

I plan to return to Tokyo tomorrow.

We often have picnics by the river on weekends.

He acted against his parents' opinion.

I will return tomorrow.

He returned the sword to its sheath.