The forest green tree frog, a species endemic to Japan, has a beautiful green body.

He is using morphine to alleviate pain.

He decided to train in seclusion on a mountain for self-improvement.

He is training in seclusion on a mountain to become stronger.

String theory is a branch of physics that is a theory for understanding the basic structure of the universe.

He wrote a new paper on string theory.

Eishin likes games.

I enjoyed a picnic in the woods.

I often spend New Year's Eve with my family.

Three days ago, I went to Tokyo.