
Some seeds you can’t spit out.
From 3 August the Seibu department store in Ikebukuro, Tokyo is holding a Midsummer Gourmet Festival. One of the standout items for sale at this event are onigiri rice balls that look just like watermelons.
That seemed like a fun summer take on a classic Japanese food, so our veteran reporter Mr. Sato went down to check it out. However, when he got on the train to Ikebukuro, he was hit with a sudden wave of shame and remorse.
Most writers, when looking back on their body of work, often find things that they wrote which makes them shudder with revulsion today, having grown and developed their skills. In Mr. Sato’s case, an article was written on 13 July 2010 titled “I tried eating watermelon on rice.”
It was a truly boneheaded idea which a young, inexperienced Mr. Sato came up with that putting diced watermelon on rice might actually taste good. When it didn’t, he decided to double down on his theory and added soy sauce and vinegar to the concoction, ultimately deluding himself into thinking that made it better. Still not satisfied with his horrible premise, he then proceeded to make a watermelon egg salad, which also was not good.
▼ Cub reporter Mr. Sato, eating watermelon egg salad
Ever since that catastrophe, he vowed to never write about watermelon and rice together again. Of course, there aren’t many opportunities to write about watermelon and rice together, so he had forgotten about that vow until just now, as he was heading out to buy a watermelon onigiri.
This lingering feeling of regret hung over him even when arriving at Yunotani Tawara Daimyo in the basement of Seibu, where the watermelon rice balls are sold.
Mr. Sato bought a Watermelon Rice Ball for 650 yen (US$5) as well as Edamame & Salty Kelp and Sockeye Salmon ones for 250 yen ($2) each. At this store, all onigiri are made with Koshihikari rice from Uonuma, Niigata Prefecture, so they sell at a bit of a premium compared to other rice balls.
The Watermelon Rice Ball, however, was particularly pricey, owing to its relatively large size of about 10 centimeters (3.9 inches) in diameter. Its delightful design was a luxury as well. Yunotani used two different types of seaweed to accomplish the watermelon-like stripes on the outer surface.
Mr. Sato still had no idea what was inside though. Did they have the gall to put in actual pieces of watermelon like he had 12 years ago? He shivered at the thought of it as he bisected the onigiri for examination.
Our reporter was relieved to find that Yunotani was not as foolish as he had been, and refrained from putting real watermelon with rice. Still, the inside also had a very watermelon aesthetic. Spicy pollock roe, known as mentaiko was used to give the rice a reddish hue while maintaining a beloved onigiri taste, and little black sesame seeds were used to simulate the watermelon seeds.
It tasted great too, largely due to the fine Koshihikari rice’s sublime texture that was enhanced by the extra layer of seaweed. Mr. Sato thought that this was how someone with real creativity would fuse watermelon and rice together.
There’s still time to try a Watermelon Rice Ball while the Midsummer Gourmet Festival continues until 22 August. For those who can’t get one — whatever you do — don’t put actual watermelon on rice. You’ll only live to regret it.
Store information
Yunotani Tawara Daimyo / ゆのたに俵大名
Tokyo-to, Toshima-ku, Minamiikebukuro 1-28-1, Food Hall First Basement
東京都豊島区南池袋1-28-1 食品館地下1階
Hours: 10 a.m. – 9 p.m.
Photos © SoraNews24
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!









Weiner Onigiri: Japanese convenience store rice ball has a surprise in store for Mr Sato
We make salt from our reporter’s sweat, then taste the world’s first Mr. Sato Salt rice balls
Rice balls aplenty at the Ministop senbero, but with a special twist【Japan’s Best Home Senbero】
Japanese convenience store’s newest rice ball filling: Nothing at all, and why we’re OK with that
Say hello to the Big Bomb Onigiri, a beast of a Japanese rice ball
Private booths are coming to Japan’s Shinkansen bullet trains even sooner than we’d thought【Video】
The Purple Lucky Bag from Village Vanguard is an extra-large waste of money
Japanese beef bowl chain Sukiya’s 2026 Smile Box lucky bag basically pays for itself
Dragon Quest Burgers and Slime drinks are coming to McDonald’s Japan【Video】
Harajuku’s new permanent Tamagotchi shop is filled with cuteness and a surprising lack of poop
Majority of Japanese mayors say foreign residents are essential but most see good and bad effects
Nephew receives SD card after his uncle passes away, finds treasure trove of gems from the past
New Japanese menstrual product seeks to help women spot unidentified iron deficiencies
Brand-new Pokémon park opens in Japan with larger-than-life-size Lapras【Photos】
Our top 3 cafes in Azabudai Hills, Tokyo’s newest and possibly swankiest shopping complex
Starbucks Japan ready to get Year of the Horse started with adorable drinkware and plushies【Pics】
Hayao Miyazaki says Happy New Year to Studio Ghibli fans with new art for Year of the Horse
We found possibly the quietest Japanese-style hotel in Tokyo’s bustling Shinjuku district
Cup Noodle tries an authentic Jiro-style ramen, but something’s not quite right
The best Starbucks Japan Frappuccinos we want to drink again in 2026
We revisited Sweets Paradise after a decade to see if Japan’s dessert buffet still delivers
That time Seiji called JASRAC to ask why he didn’t get paid royalties for his song being on TV
Japan’s oldest largetooth sawfish in captivity back on display in Mie Prefecture
Pizza Hut Japan’s hot lucky bags are perfect for a New Year’s pizza party
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 considering law requiring more trash cans following litter increase in heavily touristed area
Tokyo’s Tsukiji sushi neighborhood asks tour groups to stay away for the rest of the month
Tokyo event lets you travel back in time, for free, to celebrate 100 years since Showa era start
Japan may add Japanese language proficiency, lifestyle classes to permanent foreign resident requirements
Sanrio theme park in Japan announces plans to expand into a Sanrio resort
Stamina-destroying “Paralysis Noodles” are Tokyo’s newest over-the-top ramen innovation
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
Japan’s deadliest food claims more victims, but why do people keep eating it for New Year’s?
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
Got rice? The tastiest rice ever compels bread-fan Mr. Sato to eat more rice than ever before
The Big Bomb Onigiri Japanese rice ball helps us conquer mountain race but conquers us in the end
Around Japan in 47 rice balls: Mr. Sato buys each prefecture’s musubi all from one Tokyo shop
The world’s most famous sushi restaurant sells seaweed too, so we made nori rice balls with it
Drinkable rice balls appear in Japan, allow you to chug the country’s favorite snack on the go
Tapioca onigiri brings boba to the world of rice balls
Massive 1-kilogram (2.2-pound) rice ball on sale in Japan, perfect for eating or self-defense
Tokyo’s biggest, craziest rice ball is both a 2.2-pound monstrosity and great value
Sushi and onigiri rice balls get a new look with rollable furikake
Pokémon Poké Ball rice balls now on sale in Japan, don’t taste like jelly donuts【Taste test】
Japan’s realistic railroad crossing capsule toys bring back painful memories for Mr. Sato
“Android” arrested for rice ball theft in Japan, Android Woman denies involvement
Rice ball melon bread – A treat Japanese bakeries aren’t crazy enough to make, but we are【SoraKitchen】
We learn the dark secret of Japan’s Woodstock rice balls, still want to eat them【Taste test】
Should you warm up your convenience store onigiri rice balls in the microwave?【Taste test】
Leave a Reply