Phoenix Seagaia Resort with Kids: Miyazaki Family Guide (2026)

Phoenix Seagaia Resort is Miyazaki’s all-in-one family destination — a coastal complex set in the black-pine belt north of the city, built around a 154-metre hotel tower (Miyazaki’s tallest building), with an indoor pool, an indoor playroom, a summer splash area, hot springs, golf, and the city’s zoo next door.

With kids, it’s the easiest single-property family vacation in Kyushu: drop your bags, hit the pool in the morning, the pine-forest onsen in the afternoon, and have dinner without ever leaving the property. One thing to know up front — the water and play facilities are for resort guests, not day visitors.

This guide covers the family-relevant facilities, what is free for guests and what is not, and how the resort compares to a downtown Miyazaki base paired with Aoshima Beach.

Why Phoenix Seagaia works for families

Most Japanese resorts are either pure ryokan (kids welcome but adults-focused) or theme parks (no relaxation).

Seagaia hits the sweet spot: hotel-style amenities, several kid attractions on the property, and a pool and hot spring that come with the room rather than with a separate ticket.

With small kids, you can do nothing but the resort for two days and still feel like you had a full holiday.

Layout: the Ocean Tower hotel plus forest condominiums and cottages, spread through a coastal pine belt and linked by a free in-resort shuttle
Best months: the indoor pool and indoor playroom run year-round; the outdoor splash area and garden pool are summer only
Getting there: about 25 minutes from Miyazaki Airport and about 25 minutes from JR Miyazaki Station, with a free hotel shuttle from the station three times a day (no reservation)
Day trip vs overnight: the pool, playroom and splash area are guest-only, so a day trip means the zoo and the grounds — overnight is what unlocks the resort

Phoenix Seagaia attractions for kids

Resort grounds, KIDS OASIS and the splash area

The grounds hold the hotel, restaurants, gardens and play zones, with the pine forest between the buildings and the shore. Paths are wide and stroller-friendly, and the in-resort shuttle is free.

Two of the kid attractions sit on the third floor of the Ocean Tower or just outside it. KIDS OASIS is an indoor playroom for ages 0–12 with large climbing equipment, a Tarzan rope, a block-art wall, a book corner and a toddler zone. In summer, the outdoor splash area adds a 12.8-metre parallel slide and a 29.9-metre loop slide (both 120 cm and up), an inflatable Bubble Hill, a Splash Tree for ages 4+, two mini slides for two-year-olds to preschoolers, and water guns.

KIDS OASIS: 9:00–20:00, ¥550 per person for two hours (ages 2 and up), resort guests only, adult supervision required
Splash area: summer season only, free, resort guests only; changing rooms and valuables lockers on site

The indoor pool at The Ocean Club

Seagaia’s indoor pool is on the third floor of the Ocean Tower, inside the resort’s fitness club, The Ocean Club. It reopened in this form on 25 April 2026 with two colourful children’s slides and a new shallow area, alongside a gym, a sauna and a hot bath for adults.

It is indoors and usable in any weather, which is what makes a Seagaia stay work in winter or in a typhoon week. It is not, however, the old Ocean Dome — see the FAQ below.

Hours: pool and gym 7:00–21:00; children may use the pool 9:00–18:00
Price: free for Ocean Tower guests through checkout day; forest condominium and cottage guests pay ¥2,000 per visit or ¥3,400 for the day; there is no day-visitor entry
Rules: under-12s need an adult with them, and any child under 140 cm needs an adult over 20 in swimwear in the water; the gym and sauna are 16 and over

Browse Phoenix Seagaia and Miyazaki activities on Klook →

Miyazaki City Phoenix Zoo (next door)

The zoo is run by the city of Miyazaki and sits next to the resort rather than inside it, so it is a separate ticket — but it is the obvious half-day pairing with a Seagaia stay. Its signature event is the Flying Flamingo Show, and there are keeper talks for the elephants and chimpanzees plus a goat parade. An amusement-park corner and a summer flowing pool share the site.

It is stroller-friendly, and preschoolers get in free, which keeps a family visit cheap. Note the Wednesday closure before you plan around it.

Hours: 9:00–17:00, last entry 16:30; closed Wednesdays
Price: ¥840 adults (high school and above), ¥420 junior-high, ¥310 elementary, preschoolers free; car park ¥400
Official site: miyazaki-city-zoo.jp

What is included, and what costs extra

The hotel was called the Sheraton Grande Ocean Resort until 5 June 2025. Since 6 June 2025 it has traded as the Phoenix Seagaia Ocean Tower, so search under the new name — the building, the tower and the facilities are the same.

Free with an Ocean Tower room: the indoor pool at The Ocean Club, the Matsuzenkyu hot spring (a ¥150 per person per night bathing tax is settled at the hotel), the summer splash area and garden pool, and the in-resort shuttle
Paid on top: KIDS OASIS at ¥550 per person for two hours, the private “Hanareyu” onsen cabins at ¥6,000 per 60 minutes, and the zoo next door
Not sold to day visitors: the indoor pool, the splash area and KIDS OASIS are for resort guests, so there is no pool day pass to buy
Best timing: pool in the morning while children’s hours are open, zoo in the early afternoon, onsen after the kids have run themselves out

Because the pool and the onsen come with the room, the room rate is doing more work than it looks like at first glance for a family of four.

Compare Phoenix Seagaia Ocean Tower rates and other Miyazaki stays on Agoda →

Coming for the day instead? The zoo and the resort grounds are open to everyone, and tours in the area book out in peak summer.

Book Miyazaki day tours and tickets on Klook →

Family-friendly tips

Stroller: paths and the resort shuttle are stroller-friendly; the pool deck is easier with a foldable
Meals: the tower has a garden buffet, a Japanese restaurant, teppanyaki, Chinese and a 42nd-floor Italian restaurant, plus cafes — check current prices when you book
Beach access: the shore sits beyond the pine belt, a short walk from the hotel
Tattoo policy: Matsuzenkyu does not allow visible tattoos as a rule — book a private “Hanareyu” cabin (¥6,000 / 60 min) if that affects your family
Pool rules: children swim 9:00–18:00, and anyone under 140 cm needs an adult in the water with them
Cash + card: cards are accepted across the resort

Day trip or overnight? Our verdict

The honest answer depends on your kids’ ages. Here’s how the two options compare for a typical family.

Factor	Day trip	Overnight stay
Best for	Kids 6+	Under-6s & nappers
Cost	Zoo ticket only	Room, with pool and onsen included
Pace	Rushed single day	Pool morning + beach evening
Pool entry	Not available to day visitors	Free for Ocean Tower guests

Our take: with under-6s, overnight wins — the included pool and onsen plus a midday nap in the room offset the rate. For older kids, a day at the zoo from a city base is plenty.

Pair Seagaia with downtown Miyazaki

Day 1 at Seagaia (pool + zoo + beach), Day 2 in Miyazaki city (Tachibana arcade, mango cafe).

Or stay at Seagaia 2 nights and use Day 2 as a day trip to Aoshima Shrine and Udo Shrine, keeping the resort as your base.

Phoenix Seagaia with kids: FAQ

Is Phoenix Seagaia worth it with toddlers?

Yes. The shallow pool area, the 0–12 indoor playroom, and stroller-friendly paths make it one of Kyushu’s easiest resorts for under-3s — and preschoolers get into the zoo next door for free.

Is the indoor pool the same as the old Ocean Dome?

No. The Ocean Dome, the Guinness-listed indoor water park with the retractable roof, closed on 30 September 2007 and was demolished between August 2016 and April 2017. Today’s indoor pool is a much smaller facility inside the hotel’s fitness club, reopened in April 2026 with two children’s slides and a shallow area.

Do I need to book pool tickets in advance?

There are no pool tickets to book: the indoor pool comes with an Ocean Tower room and is not sold to day visitors. What to book early is the room itself, in peak summer.

Phoenix Seagaia Resort with Kids: A Family Guide to Miyazaki’s All-In-One Resort (2026)