He is majoring in psychology.

Gaku is my best friend.

He has a deep interest in archaeology.

I started decluttering and decided to throw away unnecessary things.

I participate in the school's cross country race every year.

He achieved the 'all simples' yaku in mahjong.

A healthy diet and moderate exercise help boost immunity.

He is an expert in mechanics.

The Earth maintains its shape due to centrifugal force.

He has a strong ability to get things done to make the project successful.