He is an expert in theoretical physics.

He learned how to operate the anti-tank gun.

We should always remember the power of Kannon in difficult times.

The National Research and Development Agency plays a crucial role in advancing science and technology.

In this forest, various organisms live by building a relationship of mutualism.

In ancient Japan, the Housou clan played an important role.

The phrase 'the good and bad deed cancel out' perfectly describes his past actions.

Ainoya-san is my best friend.

We report the progress of the project based on the principle of reporting, contacting, and consulting.

Special relativity is one of the fundamental theories of physics.