He felt a sharp pain in his groin.

He is known as a solitary genius.

He is deeply involved in national affairs.

Japan in the Edo period closed the country to foreigners.

Japan pursued a policy of national isolation for a long time during the Edo period.

He was invited as a state guest of our country.

He is good at playing the huqin.

My dream is to live in the United States someday.

This realm is our treasure.

The progress of technology from the past to the present is astonishing.