도쿄

In a sentence

• 도쿄는 일본의 수도입니다.

  Tokyo is the capital city of Japan.

  Here, "도쿄" is used as a proper noun referring to a specific place — the capital city of Japan.

• 도쿄에서 맛있는 음식을 많이 먹었어요.

  I ate a lot of delicious food in Tokyo.

  In this sentence, "도쿄" is again a proper noun, but it serves as the location where the action of eating took place.

• 도쿄의 거리는 깨끗하고 정리정돈이 잘 되어 있습니다.

  The streets of Tokyo are clean and well-organized.

  Here, "도쿄" is used to specify the subject "the streets of Tokyo," indicating possession or association.