Ascott Marunouchi Tokyo 位於東京市中心，距離東京車站 800 公尺。裝潢典雅的客房位於較高樓層，享有市景。全館提供免費 WiFi，住客可免費使用館內健身中心。
所有客房均禁菸，設有平面電視、沙發和保險箱。私人廚房內配備微波爐、電熱水壺和冰箱，還提供玻璃酒杯和咖啡機。私人衛浴附浴缸、吹風機和免費盥洗用品。為了保障客人的舒適，住宿提供拖鞋和睡衣。此外也提供兒童電視節目。
24 小時接待櫃台提供行李寄存和禮賓服務。館內亦提供乾洗服務和飲料自動販賣機。並設有商務中心，提供傳真／影印服務。住客在一天繁忙的行程後，可於館內花園或公共休息區放鬆身心。
館內餐廳供應自助式早餐。此住宿距離餐廳、咖啡廳和 24 小時便利商店步行均不到 10 分鐘。
住宿距離日本皇居步行 15 分鐘，距離築地魚市場搭乘電車有 25 分鐘車程。距離羽田機場約 50 分鐘車程。
電氣設備定期檢驗通知：
Guests must reserve a swimming pool with a maximum of 5 people per use (up to 60 minutes).
Swimming pool: 08:15–20:30
Please note that a maximum of 1 well-disciplined dog can be allowed to stay per room. Please contact hotel staff in advance for details.
Please note that the property can only accommodate dogs with a maximum weight of less than 8 kg.
All pets staying at this property must have up-to-date vaccinations.
Restaurant Triple One's business hours change depending on the season. Please contact the hotel for details.
Please note that the hotel will experience a power outage on the following dates and times due to statutory inspection of electrical equipment in the building: 28 September 2025, from 03:45–18:00. All guests and staff will be required to leave the building during inspections between 11:30 and 18:00 and no entry will be permitted.
每人每晚住宿稅費不包含在房價內，需於住宿處另外支付。