Eisaku is my best friend.

I sampled a new product at the supermarket.

I sampled the new product at the supermarket.

My workplace is located in the center of Tokyo.

He is an expert in ethology, and his research is highly regarded worldwide.

He likes to take a walk in the park at dusk.

Chrysophyta perform photosynthesis underwater.

Chrysophyta are living in this pond.

I have been communicating with him for a long time.

He hiked the mountain alone.