His collection of books is so vast that it would take a lifetime to finish reading them.

His book collection is very extensive, including many rare books.

He devoted his lifetime to music.

Issei is my best friend.

I finished my work and went home.

He finished the project.

He fell ill with the flu.

She let out a laugh that sounded like 'kaka'.

How long does it take to go from Tokyo to Osaka by Shinkansen?

He is my best friend.