When an ambassador prefers a carriage, he rides from Tokyo Station (at the time of writing, in front of the Meiji Life Insurance Headquarters as the station is under refurbishment) up to the carriage way of the Main Palace on the grounds of the Imperial Palace.
馬車を使用した場合、東京駅（東京駅改装中に付、現在は明治生命本店前）から皇居宮殿御車寄までの道のりになる。