In addition, the settlement featured many foreign diplomatic offices; the Legation of the United States of America was established there in 1875 and remained there until it was relocated to what is now Akasaka (Minato ward, Tokyo) in 1890.
また外国公館も多く、1875年にアメリカ合衆国公使館が設置され、1890年に現在の赤坂(東京都港区)に移転するまで続いた。