He decided to descend from the mountain because he got altitude sickness.

This world where people live is beautiful, and sometimes harsh.

Humans can make mistakes.

This old document details the lifestyle of humans.

Mr. Tanaka, sorry to have kept you waiting.

Pisonia umbellifera, also known as Udonoki, is a plant commonly seen in tropical regions.

The Pisonia umbellifera is known for its beautiful flowers.

Mr. Takadono is my best friend.

As a measure against flooding, we piled up sandbags around our house.

He became infected with a cold.