He was hiding the fact that he was an illegitimate child.

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

Let's cherish every encounter with the spirit of 'once in a lifetime'.

Life is a series of ups and downs.

He does his work perfectly, dotting the i's and crossing the t's.

I conducted an interview in a question-and-answer format.

She was a secret kunoichi (female ninja).

He threw a handful of sand into the sea.

"Once in a lifetime" means to cherish the encounter that happens only once in one's lifetime.

He missed a once-in-a-lifetime opportunity.