Ex post facto laws pose a problem for a fair legal system.

He conducted the trial based on common law.

He perfectly understands the correct orthography of Japanese.

He is working with a devilish method.

He drew a picture using perspective.

Kenpo is my best friend.

In Buddhism, the correct teaching is considered to be the Holy Law.

Miyabi is my best friend.

He studied the mystical arts of a holy sage and dedicated his life to helping people.

Spectroscopy is an important means of investigating the properties of matter.