
Do you love hot springs and spas? How about Tokyo? If so, we have good news for you! A new onsen (hot spring) spa, the largest in Tokyo, is currently under construction right here in beautiful Shinjuku! Even better, it’s set to open at the end of July.
We were so excited about this ginormous new relaxation spot, we sent a writer to check out the new spa, called Thermae-yu, to see how it’s looking these days. Along the way we learned a certain secret that’s not actually a secret, but may disappoint die-hard onsen fans.
The official RocketNews24 headquarters/offices/secret superhero base is, in case you didn’t know, also located in Shinjuku. We won’t give you the exact address, but we will say this: The power was in you all along. More importantly, the office isn’t terribly far from the location of Thermae-yu, which is nearly ready for the public, so Yoshio, one of the dashing writers for RocketNews24 Japan, decided to go check it out.
▼ It’s not particularly exciting yet, is it?
The future spa is close to Hanazono Shrine and located next to the Shinjuku Yuhodo Park’s Four Seasons Pathway (新宿遊歩道公園 四季の路, or “Shinjuku yuhodo koen shiki no michi” in Japanese), pictured below, giving the area a nice, lush green feel. That certainly sounds like a great place for a “natural” onsen spa! In addition to the nice location, the building has two underground floors and four above-ground floors, making it the largest in Tokyo.
However, you’ll notice we used quotation marks with the word “natural.” Apparently, there aren’t any actual hot springs at Thermae-yu — but it turns out there will be real hot springs water at the spa!
Wait, what?
▼ Is this magic? Do they have a contract with Gandalf?
While it’s not quite sorcery, it’s also not quite the same as a regular hot spring. It turns out water will be transported to the spa everyday from real hot springs. This sort of thing is actually pretty common with urban onsen complexes, with many of them making trumpeting the exact locations where they hot spring water comes from (Thermae-yu hasn’t officially announced where it’s sourcing its water from). Thermae-yu’s website indicates that the water will be “heated, diluted, circulated, and purified” to maintain its quality, which actually doesn’t sound like a bad idea. But it’s also not exactly what you think of when you think of onsen.
So, if you’re a die-hard onsen-lover, this might be a bit of a disappointment. On the other hand, if you just want to relax a bit in Shinjuku, this honestly sounds like a decent compromise. Entry fees and the like haven’t been announced yet, and while Thermae-yu’s main target is women, men will be allowed entry as well (the bathing areas are gender-specific). So if you’re looking to wash off after a day of shopping and karaoke in Shinjuku, this looks like it will be a great place to soak before catching the train home.
Location information
Thermae-yu / テルマー湯
Address: Tokyo-to, Shinjuku-ku, Kabukicho, 1-1
東京都新宿区歌舞伎町1丁目1
Website
Images © RocketNews24






Natural hot spring bathhouse in Tokyo’s Kabukicho is a super-cheap place to stay
2018 Top 20 Day Trip Onsen Hot Spring and Spa Ranking in Japan
Tokyo hot spring allows guests with tattoos to bathe… with some very odd restrictions
Love hot springs and tattoos? You won’t want to miss this onsen paradise near Tokyo!
The top 10 hot springs Japanese travelers want to visit this fall
Starbucks Japan releases new drinkware and goods for Valentine’s Day
Village Vanguard’s Blue Lucky Bag may have the most impressive piece of junk ever created
New KitKat pizzas are coming to Pizza Hut Japan
Taste testing Japanese confectionary company’s vegan “meat” bun to see if it satisfies us
We try an unusual buffet of dishes made from wild game at a roadside stop in Chiba
Hokkaido has an Ice Festival that’s less famous than the Snow one, but beautiful in its own way
We followed Tokyo’s mystery walking map and ended up creating our own bar-hopping adventure
New adults go wild at Seijinshiki Coming-of-Age ceremony in Kitakyushu, Japan 【Photos】
Man arrested for violating Japan’s anti-dueling law in downtown Tokyo
The etiquette rules for visiting Shinto shrines in Japan
10 times to avoid traveling in Japan in 2026
Our 52-year-old pole dancing reporter shares his tips for achieving your New Year’s exercise goal
Starbucks Japan releases new Frappuccino and latte for Valentine’s Day
Ramen restaurant’s English menu prices are nearly double its Japanese ones, denies discriminating
Princess Mononoke magnets return just in time to treat yourself to awesome anime decorations
Umamusume anime girl plushie recalled for having parts she absolutely should not have【Pics】
Giant hotel rooms in Osaka reflect the new non-niche face of travel in Japan.
Japanese women showing rebounding interest in giving Valentine’s Day chocolate【Survey】
We ate sushi made from Japan’s most expensive tuna ever【Taste test】
Starbucks Japan ready to get Year of the Horse started with adorable drinkware and plushies【Pics】
7-Eleven Japan starts new temporary luggage storage service in over 300 branches
Disillusionment at Tsukiji’s tourist-target prices led us to a great ramen restaurant in Tokyo
Starbucks teams up with 166-year-old Kyoto doll maker for Year of the Horse decorations【Photos】
Tokyo’s Tsukiji sushi neighborhood asks tour groups to stay away for the rest of the month
Survey asks foreign tourists what bothered them in Japan, more than half gave same answer
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
We deeply regret going into this tunnel on our walk in the mountains of Japan
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
Major Japanese hotel chain says reservations via overseas booking sites may not be valid
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
No more using real katana for tourism activities, Japan’s National Police Agency says
Starbucks Japan reveals new sakura drinkware collection, inspired by evening cherry blossoms
Updated cherry blossom forecast shows extra-long sakura season for Japan this year
Human washing machine pods coming to Japanese hotels【Photos】
Is the fountain of youth located in Japan? New study supports beauty claims of famous Japanese hot spring
Beautiful new Tokyo hotel gives you the best of both worlds with hot spring bath in the big city
Five of Japan’s most unique snow-covered hot spring bathing sites
Hot Spring Lovers Rejoice! Three Unique Onsen Resorts to Try Before You Die
Massive hot spring theme park coming to Osaka Bay Hotel, a dream come true for onsen lovers
Ibaraki Prefecture promotes onsen hot springs with muscly man bathing in 4K【Videos】
America has hot springs too! Our Japanese reporter puts one to the test
The 10 best hotel hot springs in Japan, as chosen by Japanese travelers
Take the “Public” Out of Public Bathing and Make a Natural Hot Spring in the Comfort of Your Own Home
Hot springs website reveals the most popular user-picked onsen in all of northern Japan
Eight unforgettable hot springs, as recommended by Japan’s “Professor Bath”
Turn your cat’s toilet trips into day-spa visits with this adorable “onsen” litter box
Hidden gem in Tokyo: Black water hot spring hotel
18 awesome overnight hot spring trips from Tokyo, and a quiz to help pick the best one for you
Capybara hot springs are back: Rodent-friendly onsen now available all over Japan
Leave a Reply