His attitude really makes me mad.

He is thought to be insane.

He took a crazy action.

He is really a forgetful person, always forgetting names.

He swung the long sword with birds' heads carved on the pommel.

He always sticks his nose into other people's business like a busybody.

He tried kumis for the first time.

He keeps a Mongolian horse.

Learning about the existence of Yamatai-koku is very interesting.

Whatever you say to him, it's like casting pearls before swine.