Sotonami is my best friend.

Working outside the pit is dangerous.

Seigai is my best friend.

Mr. Sotozono is my best friend.

Insects have an exoskeleton, which protects their body.

This medicine is made outside of the body.

By regularly checking the key performance indicators, you can understand the performance of the company and devise improvement measures.

Mieko is my best friend.

This sentence contains non-Jōyō kanji.

This sentence contains kanji not approved for regular use.