
Soul food from a tropical island, made fresh in the capital.
Whenever we find ourselves in the vicinity of Tokyo Station, there’s one place we always visit, and its name is Potama. A cute amalgamation of the words “Pork” and “Tamago” (“Egg”), this specialty rice ball store has 11 branches throughout Japan, and only one in the entire Kansai region in and around Tokyo, located in Tokyo Midtown Yaesu.
This branch of the hugely popular Okinawa-born chain opened in 2022, bringing its unusual brand of rice balls to curious Tokyoites hungry for a taste of something new.
▼ The store is located in the underground mall area directly connected to JR East Tokyo Station, making it a convenient stop for travellers.
While everything in the underground mall might look new and shiny to overseas visitors, it takes a lot to turn the heads of a local traveller. Potama, however, does exactly that, as the pork tamago onigiri is a hard-to-get local specialty of Okinawa, an island so far from the mainland it can only be accessed by plane.
▼ While pork and egg is at the heart of the rice balls sold here, they come with extra toppings, like shrimp and tartar sauce, which we ordered.
Once you try an onigiri from Potama you’ll be hooked on the delicious taste of fluffy egg…and thick pork luncheon meat. Okinawa is famous for its love of Spam, and this rice ball embraces that love wholeheartedly, serving it up in a way that’ll remind you how good luncheon meat truly is.
▼ We’ve tried a lot of the items on the menu, but the one we keep going back to time and time again is the Shrimp Tartar, which costs 680 yen (US$4.36).
The crunch of the fried shrimp provides a gorgeous contrast to the smoothness of the pork and egg , while the tartar sauce adds a fantastic tang that leaves you with a delightfully refreshing aftertaste. According to the official website, this tartar sauce is a Potama original that contains the juice of shikwasa, a citrus fruit representative of Okinawa.
Wrapping your mouth around the delicious onigiri is like biting into an extravagant feast of flavours, leaving you perfectly satisfied afterwards and making it great value for money. Although the store has an eat-in space, you can also order it to take home with you, and surprisingly, it tastes just as good cold as it does hot, which is a testament to its greatness.
The only thing you have to be careful about when stopping by Potama is the time, as orders are made fresh so you might have to wait around 15 minutes. The wait is worth it, though, as you’ll be able to get a taste of Okinawa’s famous soul food without having to fly to the island…although if you do make it there, you’ll find many other things to tempt you aside from the rice balls.
Shop information
Potama (Tokyo Midtown Yaesu branch) / ポーたま(東京ミッドタウン八重洲店)
Address: Tokyo-to, Chuo-ku, Yaesu 2-2-1, Tokyo Midtown Yaesu basement level 1
住所 東京都中央区八重洲2丁目2番1号 東京ミッドタウン八重洲 地下1階
Open 10 a.m.-9 p.m.
Website
Photos ©SoraNews24
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!
[ Read in Japanese ]




Okinawa airport’s must-eat Pork Tamago Onigiri finally opens a branch in Tokyo!【Taste test】
Okinawan soul fool Pork Tamago Onigiri sold not at a five-star restaurant, but at an airport
We find the best “homestyle” onigiri at a super local chain of convenience stores
Okinawa soul food: We try the most epic pork and egg onigiri rice balls in Japan
Japanese convenience store packs a whole bento into an onigiri rice ball
Tokyo sweets store has a “350% Pudding Soft Serve”, and people are going wild for it
Studio Ghibli adds new Jiji’s baby plush toy to its anime merchandise range in Japan
Beautiful off-the-beaten-path spot near samurai castle in rural Japan looks like a Monet painting
Japanese figure skating star Yuzuru Hanyu and Winne-the-Pooh announce crossover merch line [Pics]
Shinto shrine in downtown Tokyo announces cosplay ban
Wagyu ramen for foreign tourists appears in Kabukicho, with a very high price tag
The Japanese city where ordering grilled chicken doesn’t guarantee you’ll actually get chicken
McDonald’s Japan’s new Chiikawa Happy Meal figures are here![Photos]
This beautiful Okinawa beach gives you the best of both worlds when visiting the prefecture [Pics]
Studio Ghibli releases new Kiki’s Delivery Service Jiji music box for anime fans
Japanese toilet aims to attract foreign tourists but not everybody is happy about it
New Japanese vending machine at Shinkansen station sells cups of ice on platform
Anime fan in Japan arrested for ordering and cancelling over 4.3 billion yen in anime merch
Starbucks Japan teams up with Traveler’s Company for new stationery and goods collection
Pokémon Center Online designates first Pokémon items that will require Japanese ID card to buy
Beautiful Totoro bonsai figure needs no watering, makes soothing rain showers whenever you want
Japan’s new beer glass is designed to force you to drink…water [Video]
End of a manga era as Weekly Shonen Jump’s circulation drops under one million
Kochia calling: Right now is a great off-season season to visit this beautiful Japanese park
This beautiful rural Japan river is a great alternative to touristy summer retreats [Photos]
Tokyo subway installing new ticket gates that don’t accept payment through Suica or other IC cards
Japan now has human refrigerators inspired by Japanese vending machines
Hatsune Miku collaborates with Hokusai’s art in new Vocaloid ukiyo-e illustration series [Pics]
New Shinkansen luggage drop-off system begins in Japan, making train travel even easier
Studio Ghibli releases anime T-shirts that pay homage to one of Hayao Miyazaki’s most personal films
Air-conditioned dress shirts arrive in Japan to save working professionals from sweltering heat
Japanese Shinkansen becomes an overnight hotel for three nights this summer
Cup Noodle unveils first-ever cold-water instant ramen in Japan
99-year-old woman rescued while attempting to climb Mt. Fuji
Japan announces sudden 400-percent increase in visa fees for foreigners entering the country
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Studio Ghibli has a new anime out, and there’s only one place in the world where you can see it
Starbucks Japan releases new drinkware and goods for Valentine’s Day
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Japan’s newest Shinkansen has no seats…or passengers [Video]
Japanese ninja certification exam attracts 131 candidates from Japan and abroad
Salomon releases Japan-exclusive Mt. Fuji hiking gear that doubles as an amazing souvenir
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
The best-selling rice ball at Family Mart is…SPAM onigiri?
Who makes Japan’s best Spam-style onigiri convenience store rice ball? Let’s find out【Taste test】
Are Family Mart’s new “exquisite” rice balls worth the high price tag?
Say hello to the Big Bomb Onigiri, a beast of a Japanese rice ball
Pokémon Poké Ball rice balls now on sale in Japan, don’t taste like jelly donuts【Taste test】
Japanese convenience store releases a new bento sandwich, but is it better than a bento rice ball?
Should you warm up your convenience store onigiri rice balls in the microwave?【Taste test】
Onikun: Epic onigiri so big they’re half demon, half rice ball
The Big Bomb Onigiri Japanese rice ball helps us conquer mountain race but conquers us in the end
Former sushi chef serves onigiri rice balls for breakfast at new morning restaurant in Japan
Tokyo store serves stunning kakigori ice dessert that looks and tastes like an onigiri rice ball
Our two-day struggle to buy the cutest onigiri rice balls in Tokyo
7-Eleven Japan now has two tiers of salmon rice balls, but is the new, cheaper one any good?【Taste test】
What’s it like to eat an enormous panda onigiri rice ball that weighs over two pounds?
Which Japanese convenience store has the best salted onigiri rice balls?