
Readers of our site may be well aware that we’re very much fond of tasty sweets, and luckily for us, desserts come in all shapes and sizes. But we honestly have to say the beautiful cake in the picture above is like nothing we’ve ever seen before! This unique piece of cake is actually so fleeting that it will literally cease to exist in its intended form within 30 minutes of being presented, so this is clearly a case where you won’t want to leave the best for last. But what exactly is this cake that looks like a transparent version of Dragon Quest’s slime?

This, ladies and gentlemen, is apparently a new species of the Japanese rice-cake confection shingen mochi. A regular shingen mochi is a Japanese-style dessert made from gyuhi, a particularly soft form of mochi rice cake, sprinkled with abundant kinako soybean powder and eaten with brown sugar syrup poured over it.
Interestingly, although shingen mochi is a relatively well-known snack in Japan, it’s actually a trademark registered product, and strictly speaking, only the variety made by the Kinseiken Seika Company based in Yamanashi Prefecture in Central Honshu can be called shingen mochi. According to one theory, shingen mochi is said to have its roots in the sugared mochi cakes that the famous Japanese medieval warlord Shingen Takeda preferred as a wartime ration, giving the mochi its name. There’s also a theory which attributes the cake’s origin to abekawa mochi, a similar type of rice cake which is traditionally eaten in Yamanashi during the summer obon festival.
▼This is what a standard shingen mochi looks like. The mochi has a sticky yet soft, jello-like consistency that’s hard to compare to anything else, and the brown sugar syrup has a thick sweetness like molasses.

▼By comparison, you can see that the special version of the shingen mochi, also made by Kinseiken, has quite a different appearance, almost like it’s made of crystal.

Well, this special cake is actually made of water from a renowned water source in the Southern Japanese Alps, and they’ve solidified the water just enough to give it a shape, which is why it’s called the “water shingen mochi” (mizu shingen mochi). According to the Kinseiken website, the mizu shingen mochi is so soft that it feels like it might break with just a gentle poke, and it melts away like water in your mouth. The water cake is, in fact, so delicate that once taken out of its container and presented at room temperature, it will lose its shape in about 30 minutes, which is why you can only have them in the shop and not to take home.
The mizu shingen mochi actually first came out as a seasonal sweet last summer, and apparently they were popular enough to make a comeback this year. Indeed, there are numerous tweets raving about how awesome the cakes are!
▼This tweet by Mika Miura, an announcer at the local Yamanashi Broadcasting System TV Station, says, “This mizu shingen mochi from Kinseiken in Hokuto City is transparent and delightfully soft! The jelly is made from underflow water from Mount Kaikoma and has a pleasant natural sweetness. Add the rich kinako powder and brown sugar syrup and it goes incredibly smoothly down your throat. The taste really is amazing!”

▼Here’s another tweet, this one by one Ikuo yamamoto: “Tried the seasonal (summer) mizu shingen mochi from Kinseiken. Refreshingly cool! And tasty! Enjoyed it very much, thank you. They’ll be introducing it on one of the radio programs this afternoon. It looks like crystal, doesn’t it?”

▼And this is what Twitter user @rarapanpusu had to say: “Had some mizu shingen mochi and then went to an outlet mall today. The sensation of eating the water cake was a bit surprising, since it felt like the cake turned into water in your mouth, but it was delicious. Highly recommended!”

▼ Twitter user @bonabona999 also tweeted about the cake, saying “Here’s the mizu shingen mochi from Kinseiken. Water-based jelly seems to be popular now, and with the kinako and brown sugar syrup, it really is quite tasty. I thought the powdery texture of the kinako might stand out too much, but that wasn’t the case at all.”

Now, that certainly makes us want to try these unique cakes, but again, they’re only available to eat at the two Kinseiken stores, both in Yamanashi Prefecture, so it looks like we won’t have the chance to have them anytime soon. Anyone with plans to be in Yamanashi, however, can try the water cakes at the store locations below. But do take note that the mizu shingen mochi are available only on Saturdays, Sundays and Public Holidays from June until the end of September. We’d love to hear how they taste and feel, if any of you out there have the chance to sample one!
【Kinseiken shop details】
Kinseiken Daigahara shop:
Address: 2211 Daigahara, Hakushucho, Hokutoshi, Yamanashi 408-0312
Tel: +81-551-35-2246
Open: 9a.m. to 6p.m.
Closed: Thursdays
Kinseiken Nirasaki shop:
Address: 154 Kotagawa, Nakadamachi, Nirasakishi, Yamanashi 407-0262
Tel: +81-551-25-3990
Open: 9a.m. to 6p.m.
No scheduled holidays
▼Now, tell us you don’t see the likeness …

Source: Kinseikei website, J Town Net , Wikipedia (shingen mochi) (all in Japanese)
Top Image: Kinseiken website

We travel to Yamanashi to try the water cake that disappears in 30 minutes!【Taste Test】
Is Kyoto’s raindrop cake as good as the original from Yamanashi?
The Japanese water cake returns to the Twitterverse …. in cat form!
New Japanese Kit Kat features flavour of traditional shingen mochi dessert
Japanese YouTuber tests out homemade Water Cake three different ways【Video】
A visit to Sri Lanka’s knockoff knockoff Uniqlo (no, we didn’t stutter) to see its rare “Pikachus”
Salomon releases Japan-exclusive Mt. Fuji hiking gear that doubles as an amazing souvenir
How to cook shiitake mushrooms like a Japanese manga character
Japan to get new high-speed train connecting Haneda and Narita airports, ease overtourism
Japan moves to enforce language requirements for foreign nationals seeking permanent residency
7-Eleven Japan releases chocolate cookies that taste like freshly baked melon bread
The quest for Dragon Quest Yoshinoya figure sets: Worth taking for fans, tricky for scalpers[Pics]
Japan announces plans for twenty-fold increase in permanent residency fees, alongside higher visa costs
Don’t judge this Kiki’s Delivery Service book by its cover, because it’s not actually a book!
One Piece docking at Round 1 amusement centers in both Japan and the USA
Japan triples departure tax, foreign tourists and locals now must pay more to leave country
Sanrio Character Poll announces winners, Hello Kitty absent from top 10 in many countries
Live-action Spirited Away stage play announces world tour with first-ever U.S. and Canadian dates
Japanese overnight sightseeing train returns for summer with ramen stops and ocean views
Tokyo has only two barley tea makers, and we visited one to see how mugicha is made
Starbucks Japan teams up with Converse Tokyo for a new limited-edition collection in honour of Tanabata
Sleep at Hoshinoya Nara Prison, one of the most unique hotels in Japan
Studio Ghibli combines anime and craftsmanship in new Totoro and Jiji Gobelin tapestry bags
Japan announces sudden 400-percent increase in visa fees for foreigners entering the country
Japanese ninja certification exam attracts 131 candidates from Japan and abroad
Studio Ghibli store Donguri Republic announces opening of first-ever store in America
New Japanese overnight train coming to connect Tokyo with Tohoku in sleep-travel style
Japan launches first overnight Shinkansen bullet train between Tokyo and Osaka this summer
Japanese sweets shop sells an ohagi so exquisite it sells out by noon
Forget Tokyo go-karts – there’s a new way to sightsee on four wheels in Japan
Japanese sweets brand creates new drinkable Cigare and we’re totally here for it
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Starbucks Japan releases new drinkware and goods for Valentine’s Day
We deeply regret going into this tunnel on our walk in the mountains of Japan
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Japan’s newest Shinkansen has no seats…or passengers [Video]
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
Japan reportedly adding Japanese language skill requirement to most common foreigner work visa
Sweet mochi popcorn: Japan’s newest East-West crossover sweet we can’t wait to eat
Visiting the Kikyoya Shingen Mochi theme park takes some planning–but it’s a stop worth making!
Sweet mochi beer? Yamanashi sweets maker teams up with craft brewer for Kuromitsu Black
It’s eco-friendly AND delicious! Popular Yamanashi sweet now comes in an edible container
McDonald’s Japan’s newest east-meets-west dessert, the Shingen Mochi Pie is here, but is it good?
Mt. Fuji jelly makes Japan’s most famous mountain a delight to look at and taste!
McDonald’s teams up with local confectioners for new lineup of very Japanese desserts