Place called Yotsuya, in between the Royal Palace and Shinjuku on Shinjuku Dori
Here https://maps.google.co.uk/maps?q=yotsuya+station+tokyo&hl=en&ll=35.686024,139.73073&spn=0.046708,0.090809&sll=35.687627,139.725409&sspn=0.023354,0.045404&gl=uk&hnear=Yotsuya+Station,+Tokyo,+Japan&t=m&z=14