Aratama no Yu

あらたまの湯あらたまのゆ

OtherTemporarily Closed

Chubu·Shizuoka

053-582-1126 aratamanoyu.jp

Contact form

Day Use

Yes

MonClosed

Tue09:00–21:00

Wed09:00–21:00

Thu09:00–21:00

Fri09:00–21:00

Sat09:00–21:00

Sun09:00–21:00

Closed for large-scale renovation from April 1, 2026, for about a year, with reopening planned for fiscal 2027. Normally closed on Mondays, but when a national holiday falls on a Monday the bath opens that day and closes the following day instead.

¥730

Adult admission is 730 yen (650 yen with certain partner coupons). Ages 70 and up and elementary school children pay 360 yen (330 yen with partner coupons).

Bathing & Water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

SaunaYes

Dry heat sauna room

Cold BathYes

Cold water plunge bath, typically used after sauna

OnsenYes

Uses natural hot spring water

Capabilities

Private BathYes

Private bath available for day-use visitors or hotel guests to reserve

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

TattooYes

Allows entry with visible tattoos

KidsYes

Welcomes children and families

Discounted child/elementary-school admission tickets exist; also has a kids' corner per aggregator listing.

DiningYes

Restaurant or dining open to visitors (not just hotel meal plans)

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels available to rent or borrow

Rest AreaYes

Relaxation space for after bathing

ParkingYes

On-site or nearby parking available

浜北温泉浜北2号（台帳番号896-002号）

Hamakita Onsen Well No. 2

曹

Bicarbonate

Color: almost colorless and transparent
Taste: tasteless
Odor: faint hydrogen sulfide; no gas evolution

Sodium Bicarbonate spring

pH 8.7Alkaline

Composition fingerprint1.0 g/kg dissolved · Hypotonic

Na⁺98

HCO₃⁻81

◀ CationsAnions ▶

Sodium Na⁺: salt's cation — pairs with chloride to make the water salty.
Bicarbonate HCO₃⁻: "soda" — softens skin, leaves it smooth.

Known good for

Smooth skindry, rough skin
Recoveryfatigue, stress

A sodium-led bicarbonate spring — the classic jūsō-sen style. Alkaline (pH 8.7), it gives the slippery, beauty-water feel on the skin and sits squarely in Japan's beauty-water family. At the wellhead the water is almost colorless and transparent, tasteless, with a faint hydrogen sulfide note.

Sampled at wellhead·Analyzed Jan 23, 2017·一般財団法人静岡県生活科学検査センター·Cert no. 第M06048号

Explore the water

Highlights

Foot Bath

Programs

About

Aratama no Yu is a straightforward day-use onsen in the Hamakita area of Hamamatsu, close to the prefectural forest park, housed in a round building that stands out from the usual bathhouse shape. There's one indoor bath, Shinrin no Yu (森林の湯), and one outdoor rock-garden bath, Sekitei no Yu (石庭の湯), and the two swap between the men's and women's sides every week. A sauna (bring your own mat) and a reservable private bath round out the options. The spot sits a bit up in the hills, and visitors describe the outdoor bath as open and airy, especially once the weather turns cool. Afterward, the in-house restaurant, Aratama-tei, serves food, and there's a small shop plus a tatami rest area with a kids' corner.

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Sergey M

1 year ago

271. あらたまの湯, Hamamatsu Super sento with onsen water for 730. Listed hours 09:00–21:00 (except Mon). They stamp the 60 Onsen of Shizuoka 24/25 booklet. They issue Toreco collector cards for the onsen. Based on the website, baths rotate M/F on different weeks. Online photos match. Has a shop, massage, restaurant, and chill zone. Popular spot — lots of elderly men in the morning. 1. Outdoor area. View of trees. Overall fairly comfortable and cozy, despite plenty of visitors in the onsen. 1.1. Large bath, clear water, "soft" water effect. Temperature 40. 1.2. Small bath, temperature 38. 1.3. Small bath, temperature 40. 1.4. Massage bath. 2. Indoor area. The interior actively uses the look of expensive exposed concrete. Comfortable to breathe. 2.1. Large bath, clear water, temperature 40. 2.2. Small bath, clear water, temperature 38. 2.3. Sauna. 2.4. Cold bath. Really enjoyed the onsen in the morning — recommended when visiting Hamamatsu.