Denji is swimming in the river.

I like to swim in the pool every day.

We often have picnics by the river on weekends.

I think he has the ability to govern this country.

Osamu is my best friend.

We often have picnics by the river on weekends.

We have a picnic by the river every weekend.

Yuji is my best friend.

Keiji is my best friend.

Koji is my best friend.