The giant burrowing cockroach is known as the world's largest cockroach.

His words are always sweet on the surface but venomous underneath.

He quoted the old phrase 'seeking a sword in a boat carved' to explain the absurdity of hoping for success without effort.

It's difficult to memorize the Hyakunin Isshu.

I like memorizing the Hyakunin Isshu.

Ogura Hyakunin Isshu is one of the classical literatures of Japan.

He said, 'It's difficult to make a life,' explaining the phrase 'When a man steps over the threshold, he has seven enemies.'