In old Japan, it was a problem that moths would eat clothes.

He is still a fledgling and doesn't understand much about the adult world.

Essential amino acids cannot be produced in the body, so they need to be obtained from the diet.

He is always speaking ill of people.

By purchasing small lot products, you can diversify your risk.

Where is the exit of this building?

It's difficult to find the clue to this problem.

Mizuguchi is my best friend.

Mr. Sekiguchi is my best friend.

Mr. Moriguchi is my best friend.