We had a deep debate about that issue.

His performance was really wonderful.

I bought a new bathing suit.

Observing manners is important in social life.

He made travel plans using a globe.

He is using an octant for navigation.

Mr. Konomi is my best friend.

Octans is one of the constellations in the southern hemisphere.

His ideology greatly influences his actions.

He recognizes the danger of extremism.