I Looked Into Atami Izusan Onsen Hotel New Sagamiya

I've been looking into all kinds of places in a row, mainly inns and campsites that seem reachable without a car.

This time I looked into "Hotel New Sagamiya" in Izusan Onsen, Atami. I'm an indoor person, so I tend to spend a lot of time in my room. When I learned that every room faces the sea and that there are private open-air baths, it caught my interest as a hotel-vacation-style getaway.

The Short Version

All 45 rooms face the sea and there are three private open-air baths, so this looked like a good fit for anyone who wants to relax both in their room and in the hot springs.
For Rakuten Mobile, the official tool gave a C rating. If signal matters to you, it might be reassuring to check ahead of time.

I've put the details below.

A Hot Spring Inn With Sea-View Rooms: What Is Hotel New Sagamiya Like?

It's a hot spring inn in the Izusan area of Atami, Shizuoka Prefecture. According to the official website, it opened in February 1985. It also seems to say that it carries on the history of Sagamiya, a long-established inn that dates back to the middle of the Edo period.

First, here's a rundown of the basic information I could pick up from the official website.

Rooms: All 45 rooms face the sea, and apparently every room has a bath and a toilet with a bidet shower. There are Japanese-style, Western-style, Japanese-Western combination, premium, and special rooms, with a total capacity of 165 guests.
In-room baths: The FAQ seems to mention three types of special rooms with their own baths filled with free-flowing source water.
Rates: As sample plans on the official website (August 1, 2026 to February 28, 2027, per person, tax included, starting from), the Special Selection plan was listed at 35,200 yen, the Standard plan at 31,900 yen, and the Light plan at 28,600 yen. I couldn't find rates for each room type.
Booking: It looks like you can book through the plan and reservation page on the official website (which goes through an external booking site), by phone, or via the inquiry form. Reservations open six months ahead, counting the month you want to stay. There also seem to be member-only plans for repeat guests.
Parking: There are 35 free spaces.
Other: Pets aren't allowed, all rooms are non-smoking (there's a smoking area), and apparently wheelchair rental is available.

Note that I couldn't find the check-in and check-out times on the pages I looked at this time. If you're thinking of staying, you'll probably need to check the official website or the booking page.

Komorin

When I saw that every room has an ocean view, I thought the view from the room window alone would be enjoyable. Even for a homebody like me, it feels like spending time in the room wouldn't be a chore.

As an Indoor Person, I'm Curious About the Three Private Open-Air Baths and How to Spend the Time After Bathing

What really stood out to me about this inn is the three private open-air baths with natural hot spring water. Aizome no Yu is a small tub for two people, and apparently it's made of ceramic. Myojo no Yu is a bit bigger and meant for families, and the third one seems to be called Hannya no Yu.

It seems that all of them are locked from the inside. You check whether one is in use by the lamp on the sign at the entrance, and if it's free, you can use it freely. They're available 24 hours, apparently, but you can't enter from 10:00 to 12:00 because of cleaning. However, I couldn't find anything about the fee for the private open-air baths or whether advance reservations are needed, at least in what I was able to check.

Here are the other baths and ways to spend your time that caught my eye.

Hot springs: The top page mentioned Hashiri-yu, said to be one of Japan's three oldest hot springs. The water type is a calcium-sodium chloride spring (isotonic, mildly alkaline, high temperature). It seems to state clearly that water is added and the water is heated, and that a circulating filtration system is used to maintain hygiene.
Main communal bath: It's on the first floor, separated by gender, and apparently looks out over Sagami Bay. It's available 24 hours, but closed from 10:00 to 14:00 for cleaning. The attached kamaburo seems to be a low-temperature sauna kept at 60 degrees Celsius and 50% humidity.
Open-air bath with a view: Separated by gender, and apparently you can watch the sunrise from the horizon. It's also available 24 hours, but closed from 10:00 to 12:00 for cleaning.
Post-bath lounge: At the bar lounge "Emerald," soft drinks seem to be served free of charge from 15:00 to 17:30.
Meals: Kaiseki cuisine, and it looks like you choose a plan with meals served in your room when you book. If you'll be late for dinner, you can call ahead and they'll apparently keep it ready until 7 p.m. There are also restaurants called Shiosai and Hamayu.
Facilities: Apparently there's a gift shop, three private salons, a lobby cafe, a beauty salon called WAKAN (by reservation only), a mahjong room, karaoke, and more. The pool is open only in summer.
Wi-Fi: Free Wi-Fi is available in guest rooms, the lobby, and meeting rooms.

As for day-trip bathing, the FAQ says there is a day-use bathing plan. But I haven't checked the day-use plan page, which should have the details, so I don't know the conditions or the fee.

As a Paper Driver, I Wondered About the Shuttle Bus From Atami Station

I have a license but I don't drive, so whether I can get there by public transportation is an important point. According to the access information on the official website, it's about 7 minutes from Atami Station by shuttle bus. The shuttle bus requires a reservation, which it seems you make by phone.

Regular schedule from the station: 14:30, 15:00, 15:30 (may not run), 16:00
Regular schedule from the hotel: 10:00, 10:30 (may not run), 11:00
New Year period: A different schedule applies from December 26, 2026 until the morning of January 4, 2027.

The boarding location is shown on a map image, and I couldn't find a written explanation. I also couldn't find any mention of local buses or taxis, so it seems better to look into those ahead of time.

By car, it's located along the Atami Beach Line. The route given goes from the Tomei Expressway through the Odawara-Atsugi Road and the Manazuru Road, then onto the Beach Line. There was also a note saying that an Atami toll gate will open on the Atami Beach Line on October 1, 2026.

Komorin

A shuttle bus that takes about 7 minutes from the station was great news for someone who doesn't drive. But the number of runs seems limited, so I'd want to plan my arrival time carefully.

Rakuten Mobile Signal Conditions

Since I use Rakuten Mobile, the signal situation is something I care about. I checked this property's location (Izusan, Atami) with the official "my Area Connectivity Simulation" tool.

The overall rating came up as C. It seems like a good idea to check once before you use it on site.

The tool's rating is only a rough guide based on the location you enter. The actual conditions may vary depending on where you are in the building, which room you're in, the weather, and so on. On the other hand, according to the official website, free Wi-Fi is available in guest rooms, the lobby, and meeting rooms. If it were me, I'd use the hotel's Wi-Fi on site and take care of any necessary contacting or research beforehand.

If you're worried about signal conditions, please check your destination with Rakuten Mobile's official connectivity simulation.

Komorin

I was a little disappointed by the C rating. Still, since there's free Wi-Fi, I feel like I could get by if I just saved some videos and reading material beforehand and relaxed in the room.

See Rakuten Mobile Details

Wrapping Up

To sum it up, my impression of Hotel New Sagamiya is that it's a hot spring inn where all 45 rooms face the sea, and where you can really enjoy both the hot springs and the scenery, with three private open-air baths and an open-air bath with a view.

It's about 7 minutes from Atami Station by shuttle bus, so it looks easy to get to even if you don't drive. However, the shuttle bus requires a reservation, and the number of runs seems limited. Since Rakuten Mobile got a C rating from the official tool, it might be good to plan on using the hotel Wi-Fi and to prepare in advance.

I couldn't confirm the check-in and check-out times, the fee and reservation requirements for the private open-air baths, or the details of day-use bathing. If you're considering a stay, please check the latest information on the official website.

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