Daiwa Roynet Hotel Tokyo Ariake (ダイワロイネットホテル東京有明) closed on March 31, 2024. The operator has officially announced the closure, and the hotel can no longer be booked. The building was subsequently renovated and reopened on December 20, 2024 as DoubleTree by Hilton Tokyo Ariake (ダブルツリーbyヒルトン東京有明, 363 rooms). This article first looks back at why the hotel was so popular, using measured guest review data up to its closure. It then shows measured listed prices for four Ariake-area hotels that can currently serve as a base for events at Tokyo Big Sight, comparing weekdays, weekends and event dates (JIMTOF2026 and Comic Market 109).

Daiwa Roynet Hotel Tokyo Ariake Closed on March 31, 2024

Daiwa Roynet Hotel Tokyo Ariake opened in October 2018 with 368 rooms. About a 1-minute walk from Kokusai-Tenjijo Station on the Rinkai Line and within walking distance of Tokyo Big Sight, it became a go-to hotel for exhibition and event attendees. Rooms were mainly doubles (182) and twins (128), and the hotel had a fitness gym and a lounge. The official closure notice pointed guests to seven other Daiwa Roynet hotels that remain open in Tokyo, including Tokyo Kyobashi PREMIER, Ginza PREMIER and Nishi-Shinjuku PREMIER. The brand also continues to operate properties nationwide, including in Wakayama.

Its Ratings Were Driven by “Location” and a New Building

How the hotel was rated up to its closure is clearly recorded in the review data. Across N=4,794 guest reviews posted between its opening (October 2018) and its closure (March 2024) (HotelBank Editorial Team research), the overall score was 4.67. The top categories were Location 4.74 (N=804), Comfort 4.64 (N=534), Property Condition 4.62 (N=889), Cleanliness 4.61 (N=1,578), Rooms 4.56 (N=1,819) and Bathroom 4.52 (N=1,796). A location within walking distance of the venue, combined with the cleanliness of a building only a few years old, is what made it the standard choice for event stays.

But “Service”, the Most-Answered Category, Scored 4.29 — the Lowest Major Category

Looking only at the high scores gives a misleading picture. The category with the most responses was “Service” at N=2,800, equivalent to nearly 60% of all reviews, yet its score of 4.29 was the lowest among the major categories. “Facilities & Amenities”, the second most-answered category, also stayed at 4.33 (N=1,269). In other words, the reasons guests supported this hotel come down to a location walkable to the venue and a new building, not the level of service or in-house facilities. If you want to reproduce the same convenience at another hotel, prioritize distance from the station and venue, and building age; setting high expectations for service is where you are more likely to be disappointed.

The Building Reopened as DoubleTree by Hilton Tokyo Ariake

After the closure, the building was renovated and reopened on December 20, 2024 as DoubleTree by Hilton Tokyo Ariake. It has 363 rooms and keeps the same location, about a 1-minute walk from Kokusai-Tenjijo Station. For anyone searching the old hotel name for “a hotel 1 minute from the station and walkable to Big Sight”, this is the option at the same site with the closest conditions.

Measured listed prices show that at DoubleTree by Hilton Tokyo Ariake, the median lowest-plan listed price on regular weekdays (Mon–Thu, excluding holidays and event periods) was ¥31,136 (2 guests per room, tax included, N=46 days), and the Saturday median was ¥48,208 (N=15 days) (stays from September 19 to December 31, 2026; OTA public data as of September 18, 2026; HotelBank Editorial Team research). Prices have moved up with the conversion to an international brand, so if you want to keep costs down, compare it with the nearby hotels covered next.

Measured Listed Prices in Ariake — How They Move on Weekdays, Weekends and Event Dates

For the four main hotels within walking distance of Tokyo Big Sight, we tallied the lowest-plan listed price (2 guests per room, tax included) by day for stays from September 19 to December 31, 2026. Here, the listed price means the price displayed on hotel booking sites for that hotel on that day; it is not the amount actually transacted. We took the cheapest plan available each day and compared medians over each period. Beyond “regular weekdays (Mon–Thu)” and “Saturdays”, we compared the periods of Big Sight’s two largest events: JIMTOF2026 (the 33rd Japan International Machine Tool Fair, October 26–31, 2026) and Comic Market 109 (December 29–31, 2026; the first edition longer than two days since C97 in winter 2019).

Period medians of each day’s lowest-plan listed price (2 guests per room, tax included). OTA public data for stays from September 19 to December 31, 2026, observed on September 18, 2026 (HotelBank Editorial Team research). Regular weekday = Mon–Thu excluding holidays and event periods, N=46 days; Saturday N=15 days; JIMTOF nights = nights of October 26–30, N=5 days; Comiket nights = nights of December 28–30, N=3 days. Straight-line distances are approximations calculated from each hotel’s coordinate data. *For Tokyo Bay Ariake Washington Hotel, the Comiket-period figure is the listed price for the night of December 28 (no available rooms were listed for the nights of December 29 and 30 at the time of observation, so no price could be obtained).

Three Patterns — Weekends, JIMTOF and Comiket

Three patterns stand out. First, the weekend premium. Saturdays are 1.39–1.55x regular weekdays, and all four hotels move in the same direction (the largest increase is DoubleTree by Hilton Tokyo Ariake at 1.55x, the smallest Sotetsu Grand Fresa Tokyo-Bay Ariake at 1.39x). Second, during JIMTOF2026, even weekdays reach or exceed weekend levels. The median for weekday nights during the fair (nights of October 26–30) is roughly 40–60% above regular weekdays. The increase is still small on the first night (October 26), and the high level holds from the nights of October 27 to 30. Third, the Comic Market 109 period (nights of December 28–30) is the most expensive in this observation. Sotetsu Grand Fresa Tokyo-Bay Ariake rises to ¥53,000, about 2.9x its regular weekday level, and DoubleTree by Hilton Tokyo Ariake to ¥64,400, about 2.1x. At Tokyo Bay Ariake Washington Hotel, the closest to Big Sight (approx. 340m in a straight line), no available rooms were listed for the nights of December 29 and 30 at the time of observation, more than three months before the event. How tight supply gets during events differs by venue: our analysis comparing hotel supply around six exhibition venues shows an 87x gap in room counts within a 5km radius.

If Budget Comes First — Cabin-Style Hotels Are a Different Price Tier

If budget is your top priority, there is also the cabin-style Tokyo Ariake Bay Hotel (東京有明BAY HOTEL, 146 rooms). Its median lowest-plan listed price on regular weekdays was ¥3,600 (2 guests per room, tax included, N=46 days, same period and observation), and even during the Comiket period the median was ¥12,000 (N=3 days) — a completely different price tier from private-room hotels.

Booking Tips for Event Stays — Room Type, Timing and Venue Checks

For two people, check double rooms first. The former Daiwa Roynet Tokyo Ariake was also double-centric, with 182 doubles and 128 twins. The basic rule: choose a double to keep the cost for two down, and a twin for trips with a lot of luggage or companions who want separate beds.

As a rule, book as soon as the event dates are confirmed. As shown above, hotels closest to Big Sight already had dates with no listed availability more than three months before Comiket, and during large trade fairs such as JIMTOF, weekday rates rise to weekend levels. The standard approach for event stays is to secure a room first with a free-cancellation plan, then rebook later if a better plan appears. Hotels near event venues can fill up day by day as the event approaches, so tracking availability early pays off.

One more point: in 2026, checking the venue matters more than usual. Tokyo Big Sight’s East Exhibition Halls are closed for renovation from April to the end of December 2026, and some large exhibitions during this period have moved to Makuhari Messe or Pacifico Yokohama (the fact that Comic Market 109 is being held over three days for the first time in eight years is also linked to the reduced hall space during the renovation). Before booking in Ariake, confirm the venue in the event’s official announcement. If you end up staying near a relocated venue, a 2-night, 3-day model itinerary using three hotels at Tokyo Station, Kaihin-Makuhari and Minatomirai (in Japanese) is a useful reference.

There are two access points: Kokusai-Tenjijo Station on the Rinkai Line (with through service to Osaki, Shibuya and Shinjuku) and Ariake Station / Tokyo Big Sight Station on the Yurikamome Line (toward Shimbashi and Toyosu). All four hotels compared here are within 1.5km in a straight line of the former Daiwa Roynet Tokyo Ariake — that is, within walking distance of Tokyo Big Sight — so any of them lets you recreate the old hotel’s key use case: “walking over to join the morning entry queue.”

For a Closer Look

Frequently Asked Questions

When did Daiwa Roynet Hotel Tokyo Ariake close?

On March 31, 2024. The operator has officially announced the closure, and the hotel can no longer be booked. It opened in October 2018 with 368 rooms, mainly doubles (182) and twins (128).

What happened to the building?

After renovation, the same building reopened on December 20, 2024 as DoubleTree by Hilton Tokyo Ariake (363 rooms). It keeps the same location, about a 1-minute walk from Kokusai-Tenjijo Station on the Rinkai Line, making it the closest match for anyone looking for the old hotel.

Where is the cheapest place to stay in Ariake?

Among private-room hotels, Tokyo Bay Ariake Washington Hotel, with a median lowest-plan listed price of ¥15,850 on regular weekdays (Mon–Thu; 2 guests per room, tax included, N=46 days). To spend even less, the cabin-style Tokyo Ariake Bay Hotel had a median of ¥3,600 under the same conditions. Both figures are for stays from September 19 to December 31, 2026, observed on September 18, 2026.

How much more expensive is it during Comiket or JIMTOF?

Compared with regular weekdays, weekday nights during JIMTOF2026 (nights of October 26–30) were +43–57% at all four hotels. The Comic Market 109 period (nights of December 28–30) was higher still: Sotetsu Grand Fresa Tokyo-Bay Ariake at 2.92x (¥53,020) and DoubleTree by Hilton Tokyo Ariake at 2.07x (¥64,436). In this observation, the Comiket period was the most expensive.

When should I book?

As a rule, as soon as the event dates are confirmed. At Tokyo Bay Ariake Washington Hotel, the closest to Big Sight, no available rooms were listed for the nights of December 29 and 30 as of the September 18, 2026 observation — more than three months before the event. A practical approach is to secure a room with a free-cancellation plan first and rebook later if a better plan appears.

Is there anything else to watch out for when booking in Ariake in 2026?

Check the venue. Tokyo Big Sight’s East Exhibition Halls (Halls 4–6) are unavailable from April to the end of December 2026 due to renovation work, and some large exhibitions during this period have moved to Makuhari Messe or Pacifico Yokohama. Before booking in Ariake, confirm the venue in the event’s official announcement.

Methodology and Sources

■ Data Sources

Listed prices are HotelBank Editorial Team’s own tabulation based on publicly listed prices on hotel booking sites that we collect. As of September 18, 2026, we queried each stay date from September 19 to December 31, 2026 and recorded the price of the cheapest plan for each hotel on each day. All prices are per room for 2 guests, per night, tax included. Reviews are the N=4,794 guest reviews tabulated by the same team (cumulative reviews posted from the October 2018 opening to the March 2024 closure); category scores use only reviews that answered each category as the base. Room counts, room mix and opening dates are from the same team’s property data. The source for DoubleTree by Hilton Tokyo Ariake’s brand classification, room count (363 rooms) and opening year is Hilton “Company Overview” (updated August 25, 2026).

■ Assumptions

“Regular weekday” means Mon–Thu excluding holidays and event periods (N=46 days); “Saturday” N=15 days; “JIMTOF nights” the nights of October 26–30 (N=5 days); and “Comiket nights” the nights of December 28–30 (N=3 days). All are medians of the listed prices observed for each day in the period. Multiples are calculated by dividing by each hotel’s regular-weekday median, set to 1.00. Straight-line distances are approximations calculated from each property’s coordinates; because Tokyo Big Sight consists of multiple buildings, distances can vary by several tens of meters depending on which building is used as the reference point.

■ Limitations

Listed prices are prices displayed on booking sites, not amounts actually transacted. For Tokyo Bay Ariake Washington Hotel, no available rooms were listed for the nights of December 29 and 30 at the time of observation, so its Comiket-period value is N=1 (the night of December 28 only) and cannot be read with the same weight as the N=3 values for the other three hotels. The figures reflect a single observation on September 18, 2026; prices for the same dates can change depending on when you book and how remaining plans move. Category review scores have different response counts (N) per category, and categories with smaller N fluctuate more. This article also limits category scores to the 8 categories with N=500+ responses; categories with fewer responses are not included in the charts.

■ References

The JIMTOF2026 dates are from JIMTOF2026 Outline (checked September 18, 2026); the Comic Market 109 schedule and number of days are from the Comic Market Preparations Committee, “About the Comic Market 109 Schedule” (same date); and the planned closure of Tokyo Big Sight for renovation is from Tokyo Big Sight, “Usage Inquiries” (same date).