The Imperial Japanese Army was a Japanese military force that existed from the Meiji era to the Showa era.

The Imperial Japanese Navy was once the navy of Japan.

The steepest descent method is one way to solve optimization problems.

Based on the Air Pollution Control Law, factories must strengthen the management of exhaust gases.

The Riemann sum is a method for approximately calculating the integral of a function.

Verbs of the lower second conjugation are important for understanding Japanese grammar.

He started a special exercise to train his serratus posterior inferior muscle.

The obliquus capitis inferior muscle is a part of the neck muscles, helping to tilt the head.

The depressor anguli oris is the muscle that lowers the corners of our mouth when we are sad.

She lowered her eyebrows using the depressor supercilii.