He has a deep interest in literature.

This law is codified.

This law was enacted to codify long-standing customs.

During the Bunkyū era, Japanese society began to change significantly.

The books in the library are classified by genre.

He likes to read old written language.

He is my sworn elder brother, always taking care of me.

She is my sworn younger sister, always supporting me.

He analyzed the spectrum of light using a spectroscope.

'AsagayasagaA' is one of the palindromes in Japanese.