He spent the whole day playing games without leaving his house.

He came out of the room and started running immediately.

I can't forget the impression when I ate kaiseki for the first time.

Numerical analysis is a branch of mathematics that studies techniques and theories for solving mathematical problems numerically.

He is majoring in analysis at university.

Complex analysis is a branch of mathematics that studies functions of complex numbers.

He is an expert in harmonic analysis.

We dream of a day when all people can enjoy world peace.

Kaito is my best friend.

He decided to start his own faction.