Grand Mercure Beppu Bay Resort & Spa: An Honest Family Stay Review
If you’re planning a stay in Beppu and want a hotel that combines genuine onsen culture with a comfortable, well-located base, the Grand Mercure Beppu Bay Resort & Spa is worth serious consideration. We stayed here for one night in April 2025 as part of a Kyushu road trip — arriving after a full day that took in Nakatsu Castle and Umi Jigoku — and it ended up being one of the quiet highlights of the trip.
1. Why We Chose Grand Mercure Beppu Bay Resort & Spa
We’re Accor Platinum members, which means Accor properties are always our first consideration when booking. Fukuoka, the base for our Kyushu road trip, doesn’t currently have an Accor hotel — a frustration for loyalty members — but Beppu more than compensated. The Grand Mercure Beppu Bay Resort & Spa sits a tier above the standard Mercure brand within Accor’s portfolio, classified as an upper-upscale property with its own onsen source on-site.
For a family of four looking for a comfortable base in one of Japan’s most celebrated onsen destinations, with the added benefit of Accor loyalty recognition, it checked the right boxes before we even arrived.
2. Arriving at Grand Mercure Beppu Bay Resort & Spa
We drove in along the coastal road, passing the compact Beppu Tower before the hotel came into view. The exterior is understated rather than dramatic — tidy and composed in a way that suits Beppu’s quieter character as a city. It’s not the kind of hotel that tries to impress you on arrival with scale or spectacle. The impression it gives instead is one of calm reliability, which, after a full day of driving and sightseeing, felt exactly right.
Standard check-in is at 3:00 PM and checkout at 11:00 AM. As Accor Platinum members, early check-in and late checkout were both available to us — but our itinerary got in the way. We arrived after the standard check-in time and needed to leave early the next morning for Yufuin. The perks existed; we simply didn’t have the schedule to use them. Worth knowing for anyone with more flexibility.
3. Rooms & Accor Platinum Upgrade at Grand Mercure Beppu Bay Resort & Spa
1) Booking Two Rooms
Traveling in Japan with children comes with a specific consideration: most hotels count children as full occupants. The price gap between cramming four people into one room and booking two separate rooms is often smaller than expected. We booked two: a Western-style bed room at approximately KRW 130,000 and a traditional tatami room at approximately KRW 70,000 (April 2025 rates).
2) The Upgrade
At check-in, our Accor Platinum status was acknowledged and the tatami room was upgraded to a Western-style bed room. Both rooms ended up positioned side by side — a practical and convenient arrangement. We had been genuinely looking forward to the tatami experience, and missing it was a small disappointment. But an upgrade is an upgrade, and the outcome — two comfortable bed rooms overlooking the bay — was difficult to complain about.
3) Bay View Rooms
Despite arriving late, both rooms faced Beppu Bay. The upgrade likely played a role in the room selection, and the view was immediately striking. The bay in the morning light, glimpsed briefly before an early departure for Yufuin, was the kind of thing that makes you wish you’d booked a second night.
4. Small Details That Made a Real Difference
1) Welcome Cookie & Kids’ Yukata
On arrival, a welcome cookie was waiting — a small touch, but one that registers when you’re traveling with children who notice these things. More memorable for our kids, though, was the children’s yukata selection in the lobby. Multiple sizes were available for children to choose from, and ours picked theirs out immediately. Wearing a yukata in a Japanese onsen hotel is exactly the kind of moment that elevates a trip for children.
One note worth flagging: yukata are not permitted in the breakfast dining area. Children will need to change before heading to breakfast — a minor point, but one that’s easy to miss if you’re not expecting it.
2) Outdoor Pool
The hotel has an outdoor pool visible from the lobby. In April, it wasn’t yet open for the season, but it looked well-positioned and genuinely inviting. The pool operates seasonally — worth checking dates if a summer visit is on the cards.
5. Onsen: The Best Part of the Stay at Grand Mercure Beppu Bay Resort & Spa
1) Open-Air Bath
The onsen was, without question, the highlight of this stay. The hotel sits on its own hot spring source, and the facilities reflect that: a large indoor public bath, an open-air rock bath (rotenburo), and a sauna. The outdoor bath overlooks Beppu Bay and Takasaki Mountain — a genuinely beautiful setting for a soak. Complimentary access is included for all hotel guests, and bathing tax is included in the accommodation fee.
2) The Onsen Lounge
After bathing, the onsen lounge is where the stay gets unexpectedly pleasant. Guests can help themselves to drinks and rest on sofas before heading back to their rooms. Among the drinks on offer was something resembling makgeolli — the Korean fermented rice drink — though slightly sweeter than the Korean version. It divided our group cleanly: I liked it; my husband did not. Non-alcoholic options including juice were also available, so there’s something for everyone regardless of preference.
6. Breakfast at Grand Mercure Beppu Bay Resort & Spa
Japanese hotel breakfasts have a reliable quality to them, and this one was no exception. The buffet wasn’t enormous in scale, but everything served was genuinely good — clean flavors, local Oita ingredients, and a spread that covered both Japanese and Western options comfortably. A family of four with varying tastes left the table satisfied, which is the most practical measure of a hotel breakfast.
A reminder: yukata are not permitted in the dining area. Given that children will likely want to wear theirs from the moment they get up, it’s worth setting that expectation the night before.
Practical Information
- Hotel: Grand Mercure Beppu Bay Resort & Spa
- Brand: Accor / Grand Mercure (upper-upscale)
- Location: Coastal road, Beppu Bay, Hiji-machi, Oita Prefecture
- Check-in / Check-out: 3:00 PM / 11:00 AM
- Accor Platinum perks: Early check-in, late checkout, room upgrade, welcome amenity
- Room rates (April 2025): Western bed room approx. KRW 130,000 / Tatami room approx. KRW 70,000
- Onsen: Indoor public bath + open-air rock bath + sauna + onsen lounge (complimentary for guests)
- Outdoor pool: Seasonal operation
- Breakfast: Buffet style (yukata not permitted in dining area)
- Kids’ yukata: Available free in lobby (not permitted in breakfast dining area)
- Tattoo policy: Guests with visible tattoos are generally not permitted in the public baths
FAQ
Q1. Is Grand Mercure Beppu Bay Resort & Spa a good hotel for families?
Yes — it’s well set up for families. Children’s yukata are available in the lobby in multiple sizes, the breakfast buffet is family-friendly, and the onsen facilities are complimentary for all guests. Accor Platinum members can expect room upgrades, which is especially practical when booking two rooms for a family of four.
Q2. What Accor Platinum benefits are available at Grand Mercure Beppu Bay Resort & Spa?
During our April 2025 stay, Platinum benefits included a room category upgrade (tatami upgraded to Western bed room), a welcome amenity, and eligibility for early check-in and late checkout. We weren’t able to use the check-in and checkout flexibility due to our itinerary, but both were confirmed as available upon request.
Q3. What is the onsen like at Grand Mercure Beppu Bay Resort & Spa?
The hotel has its own hot spring source and offers an indoor public bath, an open-air rock bath with views over Beppu Bay, and a sauna. After bathing, guests can use the onsen lounge with complimentary drinks. Access is included in the room rate for all guests. Note that guests with visible tattoos are generally not permitted to use the public bathing facilities.
