He was arrested for committing a criminal act.

He is still a minor, so he does not have full capacity to act.

He avoided talking about actual sex acts with her.

His propaganda of the deed influenced many people.

He thought deeply about the result of that juristic act.

I'm thinking about how to move the gold general in shogi.

She is good at playing the koto.

He practices playing the guqin every day.

Koto is my best friend.

He measured his weight using a scale.