America is one of the superpowers in the world.

The theory of harmonic oscillators is a fundamental concept in physics.

My hometown is Fukuoka City, the prefectural capital of Fukuoka Prefecture.

I study Japanese every day using a workbook.

He wakes up early in the morning.

Choichiro went fishing.

Please stop deriding my dreams.

He is doing special exercises to strengthen his flexor pollicis longus.

He injured his extensor pollicis longus.

He is doing special exercises to strengthen his extensor hallucis longus.