Tokyo Metro Ueno Station (Hibiya Line or Ginza Line): Plese go out the left side on Exit 2th.
You go out Exit 2 and follow the left side backward along the the street.
You can see a brown-colored building toward the front soon after you start walking.
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You can see a brown-colored building with Lawson in 1st floor.
It’s the front of Ounoya building.