Kashikiri Onsen and Spa Sukhumvit 49

4.6(494 reviews)

Tucked into a quiet soi off Sukhumvit 49 in the Watthana district, this spa brings Japanese onsen culture to Bangkok, offering both private and public hot spring bathing alongside massage and spa treatments. Visitors consistently describe the atmosphere as calm and authentically Japanese, making it a genuine departure from the city's energy and a notable alternative to conventional Thai spa experiences. The facilities are well-maintained, and staff are attentive to individual preferences during treatments. The venue caters to couples and solo travellers alike, with private onsen options available for those seeking a more intimate experience. The hot springs are clean and the interior carries a quietly peaceful aesthetic that guests find transporting — several reviewers describe it as feeling like stepping into Japan rather than Bangkok. Massage services accompany the bathing experience, and staff can be directed on pressure and focus areas during sessions. Good to know: Reservations are recommended and can be made in advance, which is particularly advisable for private onsen bookings. Upon booking, guests may be asked to complete a form indicating treatment preferences. The location on Sukhumvit 49 is accessible via BTS Skytrain at Thong Lo station, a short journey from the main Sukhumvit corridor. Arriving without a tight schedule allows guests to make the most of the unhurried pace the onsen format is designed around.

Experience hints

Visitor favorite

Pair your visit. After Kashikiri Onsen and Spa Sukhumvit 49, round out your day in Bangkok with contrasting stops nearby.

Visitor Reviews

**Absolutely Amazing Experience!** Kashikiri Onsen and Spa Sukhumvit 49 is an incredible place that truly feels like stepping into Japan. The vibe and atmosphere are so peaceful, quiet, and relaxing—perfect for unwinding and escaping the busy city. I booked the **Onsen (45 mins) + Scrub (45 mins) + Aroma Oil Massage (60 mins)** in a VIP room for 6,890 Baht (paid in cash), and everything was just perfect. The facilities were spotless and beautifully designed, making the entire experience feel luxurious. The highlight for me was the aroma oil massage—the oil was so thick and rich, providing the perfect texture for a deeply relaxing massage. The therapists were incredibly skilled and attentive, ensuring every moment was enjoyable. If you’re looking for a serene, authentic Japanese-style spa experience in Bangkok, I highly recommend Kashikiri Onsen and Spa. It’s worth every penny, and I can’t wait to visit again!

I’ve been here 3x and I have to say that it is definitely the closest and most authentic you’d get to a real onsen in Japan, and by far the best onsen in BKK It’s also the most centrally located and accessible by public transport or if you drive. Inside the Onsen room, there was a large tub, and we could choose the fragrance for our bath. The room included a bucket of cold water with ice and a small area for towels and clothes i really enjoyed the experience and would definitely visit again when i have free time.

I love public onsens in Bangkok and I was looking for a private one to try out with my husband. Kashikiri is the first onsen we went together to here and we both loved it a lot! The place is clean and welcoming, very chill and has cute japanese decorations. You get a welcoming tea drink and a locker to store your clothes. After the onsen they take you to a massage room, we had a 60 min thai massage and it was very relaxing 😌

Location Info

84 Soi Sukhumvit 49/2, Khwaeng Khlong Tan Nuea, Watthana, Krung Thep Maha Nakhon 10110, Thailand

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Tips for Visiting Activities & Tours

Vet Elephant Sanctuaries

Only visit sanctuaries that prohibit riding, use no chains or bullhooks, and let elephants roam freely. Elephant Nature Park in Chiang Mai set the standard. If a place offers painting shows or circus tricks, walk away.

Book Through Klook or GetYourGuide

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Do Outdoor Activities in the Morning

Heat and humidity peak from noon to 3 PM. Schedule jungle treks, cycling tours, and outdoor cooking classes for early morning. Water activities are more flexible since you're in and out of the sea.