Accommodation Guide

Take a luxurious repose from your travels or work in the privacy of tranquil bliss.

  • The perfect size for perfect relaxation

    A comfortably roomy bed for some quiet time away from your travels.The ample table space can accommodate guests on business trips.

  • Room Size: 13.5㎡ | Bed Size:122cm~140cm

    Room Size: 27㎡ | Bed Size:140cm×2台

Main Facilities & Services

  • High-speed Internet (LAN & Wi-FI)

    High-speed internet available for personal laptops. Our hotel is also fully equipped with Wi-Fi.

  • In-Room Theater ※¥1,000/ 23 hours (tax included)

    A choice of 100 titles including movies, TV shows, and adult content is available on every guest room TV.

    *In-Room Theater cards are good from 1:00 p.m. to 12:00 p.m. the next day.
    *Please purchase In-Room Theater cards from the vending machine in front of the elevators.

  • Facilities
      • ・Unit Bathroom
      • ・Washlet Toilet
      • ・TV
      • ・Satellite Television
      • ・Room Theater
      • ・Internet Connection (LAN & Wi-Fi)
      • ・Phone
      • ・Kettle
      • ・Unstocked Refrigerator
      • ・Hair Dryer
      • ・Trouser press (rental)
      • ・Light stand (rental)
      • ・Memo Pad
  • Amenity List
      • ・Body Soap
      • ・Shampoo
      • ・Conditioner
      • ・Toothbrush Set
      • ・Razor
      • ・Hangers (also available for rent)
      • ・Alarm Clock
      • ・Towel
      • ・Bath Towel
      • ・Nightshirt
      • ・Slippers
      • ・Air Freshener
      • ・Shoe Horn
      • ・Tissue

Room Overview

Area Single:13.5 m2
Twin:27 m2
Audio Visual Systems

32-inch LCD (DTTV) TV

In-Room Theater ※¥1,000/ 23 hours (tax included)

Single: W 122 cm – 140 cm (Semi-double)
Twin: W 140 cm x 2
Air Conditioner An individually adjustable air conditioning system
Hotel Restaurants Restaurant Plumeria,
Chinese Cuisine Kongo Hanten
Services Massage Services, Postal Services (cash-on-delivery only)
Credit Card
    • ・VISA
    • ・JCB
    • ・American Express
    • ・UC
    • ・DC
    • ・Master Card
    • ・Diner’s Club
    • ・Saison
    • ・銀聯
Parking 8:00 a.m. – 10:00 p.m. (Size restrictions apply)
Fee: ¥2,000/night (tax included)

Click here for more information

Breakfast Guide

  • Diamond Hotel offers buffet breakfast at Restaurant Plumeria.
    Start your day away from the bustle of the city with a quiet breakfast buffet featuring a bountiful selection of Japanese and Western fare. Take your time savoring all of your favorite dishes.

    Hours: All day Breakfast Hours: 7:00AM ~ 10:00AM
    Rates ¥1,540 (tax included)
    Venue Restaurant Plumeria

* Breakfast is also available for guests not staying overnight.
* The menu may change due to the season or the availability of ingredients.

Parking Fee

Price ¥2,000/night (tax included)
Hours 8:00 a.m. – 10:00 p.m.
Capacity 50 cars

* Size restrictions apply.

Cancellation Fee

No Show 100% of the rate
Same Day 80% of the rate
One Day in Advance 20% of the rate

Guests will be charged the above fees if canceling their reservation.
(The cancellation fees will be a percentage of the standard accommodation rates.)

Payment Method & Acceptable Cards

Cash or credit card Acceptable Cards
  • ・VISA
  • ・JCB
  • ・American Express
  • ・UC
  • ・DC
  • ・Master Card
  • ・Diner’s Club
  • ・Saison
  • ・銀聯

Main Entrance & Guest Room Locks

  • The main entrance is locked during the following hours to improve security.

    1:00 a.m. ~ 5:00 a.m.

    If you are checking-in during this time, please call us using the interphone next to the entrance.
    If you are returning at this time, place your card key over the card reader next to the interphone to open the entrance.
    (If you have any problems, please call us on the interphone.)

Regarding Earthquake Resistance Standards

  • Issue Number 27-C−0000861
    Building Name Diamond Hotel
    Building Address 1-10-3 Kojimachi, Chiyoda-ku, Tokyo
    Building Structure Steel Frame & Reinforced Concrete Construction, 11 Floors Above Ground, 2 Floors Below Ground
    Building Purpose Hotel
    Compatible Category Earthquake Resistance Renovation

    This building meets the earthquake resistance standards as outlined in the law regarding the advancement of earthquake resistance renovation of buildings as well as the Building Standards Act.
    October 3, 2016

Wi-Fi & Internet

Free Internet Provided
Special settings are not required. However, users are responsible for their own computer settings. Your cooperation is requested for matters of personal responsibility pertaining to security issues. Thank you very much.

When Using a Wired Connection (LAN Cable)
The LAN port providing free Internet is located on top of the desk in the room. Please connect your computer to use it. We have a high-speed fiber-optic LAN connection for a pleasant online user experience.

When Using a Wireless Connection (Wi-Fi)
Wi-Fi is available for any portable device (computers, smartphones, etc.) with a built-in Wi-Fi receiver.
Wi-Fi is available within the hotel (guest rooms and lobby).
A password is required to connect to Wi-Fi. Please ask the staff at the front desk.

Data Usage

The guest room Internet connection service is intended for emails and online browsing. High data software and communications are regulated in order to provide connection for more users.


・Your computer settings may prevent email software from sending or receiving emails. If that happens, please access your email account via the browser. (Hotmail, Yahoo Mail, etc.)
・Our Internet connection is not protected against software viruses or illegal access. Please provide your own security measures.
・Users are responsible for any bills from paid online services.
・Our hotel shall bear no responsibility for any damage that may occur due to computer viruses, etc.
・We do not rent out computers or provide printing services.


You can call or contact us online.