
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
Family Mart commits “reverse fraud” in new Giant All-Star Festival, and we couldn’t be happier
New Square Enix Cafe reveals Final Fantasy, Dragon Quest, Nier, and Fullmetal Alchemist menu items
New Tokyo sweets shop offers 648 different mochi ice cream dumpling combinations
Godiva melts minds by releasing a new corn chocolate drink in Japan
Shinto shrine’s night sky firefly sweets are Japan’s newest breathtaking, mouthwatering desserts.
Retro fashion magazines from Tokyo’s street market remind Mr. Sato of a special gift from his dad
Ghibli’s No Face continues to demonstrate his generous character growth by dispensing soy sauce
Even at twice regular Daiso price, this handy item is still great for summer travel in Japan
Body of missing American college student found in Kyoto mountains
Gun found in Japanese convenience store restroom, traced to forgetful on-duty cop
Uniqlo reveals third round of massive 100-year-anniversary manga T-shirts for Jump’s Shueisha
Kyoto public junior high school becomes first in Japan with a hoodie school uniform
Japanese convenience store shows us how to dress for the rainy season
Starbucks Japan unveils new Frappuccino showcasing “mottainai” culture
Osaka is hosting a “hentai” event, but it’s probably not what you think
Japanese rice cooker recipe gives us a tasty new way to enjoy vegetables and wieners
Tokyo’s Pokémon Cafe reopens this month with brand-new sweets and Pikachu show
What’s it like to join Tokyo’s walking-and-talking-with-strangers club for a day?
Tokyo’s life-size Gundam anime mecha statue will be removed this summer
Ichiraku Ramen-inspired ramen sets from Naruto anime pay homage to Naruto, Sasuke, and Sakura
Kanji ice cream becomes a sell-out hit 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]
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]
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】
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
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】
Which Japanese convenience store has the best salted onigiri rice balls?
What’s it like to eat an enormous panda onigiri rice ball that weighs over two pounds?