
Famous chocolate bar gets fried up for Valentine’s Day, but it’s not exactly as great as they say.
If you’re looking to try a Japanese chocolate with a cult following in Japan, you can’t go past Yuraku Confectionery’s Black Thunder. Priced at 40 yen (US$0.26), this tiny, palm-sized chocolate can be found at shops around Japan, and it consistently ranks as one of the top sellers at Japanese convenience stores. Its immense popularity has spawned regional varieties, merchandise and even themed hotel rooms, and as the go-to chocolate for Valentine’s Day, it’s now in the spotlight again, with a brand new collaboration that’s got everyone talking.
On board for the collaboration is Hanamaru Udon, a Japanese noodle chain that’s just as famous for its tempura sides as it is for its Sanuki udon (a firm type of noodle that hails from Kagawa Prefecture). Now for a limited time, Hanamaru will be adding a new option to its fried sides for Valentine’s Day: Black Thunder Tempura.
▼ Hanamaru Udon
Hanamaru is confident that this new offering will be a treat for the taste buds, saying:
“Black Thunder Tempura sees Black Thunder being made into tempura, highlighting the chocolate’s sweetness and bittersweetness, and allowing you to enjoy its crunchy texture.
It’s surprisingly compatibile with Sanuki udon. Not only can you enjoy it as a dessert after eating udon, but it can also be taken out, so it’s a great Valentine’s Day gift.”
If you’re of the mindset that gifting a fried chocolate bar to your loved one isn’t the most romantic thing in the world, you could try and snag one of the chocolate bars being released to mark the collaboration, which Hanamaru is giving away free to the first 20 customers who order the Black Thunder Tempura at each participating outlet.
▼ Simply show the official Hanamaru udon app to staff and they’ll present you with a chocolate, subject to availability.
While Black Thunder is synonymous with Valentine’s Day for a lot of people, diehard fans like us are happy to have it any day of the week. So when we heard that the new Black Thunder Tempura was being released on 6 February, we hotfooted it down to Hanamaru’s Akasaka Hitotsugi-dori location, which is the only branch in Tokyo that sells it.
▼ There are only 30 available each day at 10 participating Hanamaru branches, so we were lucky to get our hands on it.
▼ At first glance, you might mistake this fried chocolate bar for a piece of fried chicken.
However, after taking it out of the bag and placing it on a plate, we could make out the Black Thunder silhouette, shrouded in Hanamaru’s crispy tempura batter.
Taking a bite, our taste buds were met with the sweet, familiar flavour of our beloved chocolate bar, with its characteristic cookie pieces providing a fantastic crunch that contrasted beautifully with the finer crispiness of the batter. The highlight, though, was the centre, which had melted into a fantastic gooey mess of chocolate that spread bittersweet flavours throughout the palate, leaving us salivating for more.
It was a textural sensation, and when we added it to a bowl of the chain’s Sanuki udon, we were able to appreciate the textures even further.
However, despite the chain saying the Black Thunder Tempura was a good partner for Sanuki udon, we had to disagree. The flavours did not meld well at all, and it was so bad we thought the chain was playing an April Fools’ Day prank on us.
▼ Japanese-style dashi soup and chocolate do not together.
So if you’re going to try the Black Thunder Tempura, we suggest you eat it on its own to fully enjoy the blend of crispy batter and gooey chocolate.
If the chocolates aren’t sold out, you’ll find them in the serve-yourself tempura section, in amongst the fried chicken and croquettes. At 100 yen each, they’re more expensive than the Black Thunder Tempura that debuted at a pop-up event space in Shinjuku last Valentine’s Day, but they’re even more delicious than we remembered, so we didn’t mind shelling out a bit more for them.
They’re only available for a very limited time, from 6-14 February, and only at the 10 branches listed below, so if you’d like to get a taste of them, you’ll want to get in early to avoid missing out!
● Aeon Mall Sapporo Hiraoka (Hokkaido Prefecture)
● Sendai E-beans (Miyagi)
● Akasaka Hitotsugi-dori (Tokyo)
● Tsurumi Eki-mae (Kanagawa)
● Aeon Mall Nagoya Dome-mae (Aichi)
● Senba Shinsaibashi (Osaka)
● Aeon Mall Ayagawa (Kagawa)
● Takamatsu Hyogomachi (Kagawa)
● Matsuyama Takehara (Ehime)
● Aeon Mall Nogata (Fukuoka)
Related: Hanamaru Udon location finder
Photos©SoraNews24
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!










Deep-fried “Let’s just be friends” chocolate tempura appears in Japan for Valentine’s Day
Tempura Black Thunder chocolate bars on sale in Shinjuku from now till Valentine’s Day
Black Thunder shocks fans by suspending giri choco obligation chocolates on Valentine’s Day
Udon chain’s awesome “Tempura Pass” deal works out to less than 10 yen per piece over five weeks
Black Thunder chocolate brings us the future of Valentine’s Day: Crabs!
Japanese sweets shop sells an ohagi so exquisite it sells out by noon
Studio Ghibli store Donguri Republic announces opening of first-ever store in America
7-Eleven Japan to start selling Vietnamese banh mi sandwiches this summer
Forget Tokyo go-karts – there’s a new way to sightsee on four wheels in Japan
Studio Ghibli adds new My Neighbour Totoro music box to its anime merchandise store in Japan
Starbucks Japan releases new Frappuccino, tea and soda drinks for summer
Gama Land, the weird Japanese amusement park celebrating toads, is now like a ghost town
Starbucks Japan releases new limited-edition summer drinks…and a pastry for dunking
All-you-can-eat cheese restaurant in Tokyo is a hidden gem not many people know about
Lawson Japan releases a crazy new product to remind us it’s not just famous for convenience store food
New Japanese overnight train coming to connect Tokyo with Tohoku in sleep-travel style
Universal Studios Japan is giving Frieren anime fans the chance to make unforgettable memories.
Tokyo’s life-size Gundam is getting a new look before its end-of-summer removal
Japanese bento shop touches hearts by selling super cheap boxed lunches for around a dollar
7-Eleven Japan joins the craze for Korean Gamja Cheese Balls
Lawson upsizes convenience store food for a limited time with two must-try Japanese meals
Uniqlo reveals third round of massive 100-year-anniversary manga T-shirts for Jump’s Shueisha
Even at twice regular Daiso price, this handy item is still great for summer travel in Japan
New official Ghibli anime food cookbook will teach you how to make Ponyo’s ramen and more
Japanese convenience store Lawson launches new “mini supermarket” chain, L Minimart
Japan’s real-world Pokémon hot spring’s first photos are here![Photos]
Kyoto public junior high school becomes first in Japan with a hoodie school uniform
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
Japan’s 5.3 million beautiful Hitachi Nemophila flowers are now in full bloom[Photos]
Pokémon and Ikea Japan cross over into each other’s worlds with collaboration events
Wisteria season starts early with blooming of Japan’s Great Wisteria in its beautiful garden
Fukuoka’s Inaba Udon chain comes to Harajuku and we slurp up every last drop of it
Express your love this Valentine’s season…with udon noodles topped with a humongous heart!
Japanese chocolate company sells Valentine’s Day school desks, tents, and more for nostalgia
Black Thunder becomes an epic chocolate dessert at Japanese cafe chain
Sushiro and Black Thunder fall in love with each other again for Valentine’s Day
Japanese confectioner has firm rebuttal to Godiva’s anti-obligation chocolate ad in Japan
Black Thunder grab event in Tokyo gets you a fistful of chocolate bars for less than 30 cents
Amazing Chocolate tools a perfect fit for Japanese Valentine’s Day