Walk into any 7-Eleven in Japan and you will find a shelf of triangles wrapped in film, each one labeled with a filling. Onigiri are the most ordinary food in the country, and also one of the easiest ways to taste everyday Japanese cooking.
Our team, all Japanese, tasted the five standard flavors that 7-Eleven always carries. Fillings come and go with trends, but the classics do not change. Along the way we cover how convenience store onigiri came to be, and how to eat one.
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How Convenience Store Onigiri Took Over Japan
Rice is the staple of the Japanese diet, and onigiri have been around almost as long. Lumps of cooked, shaped rice some two thousand years old have been dug out of the ground here. It is tempting to call onigiri Japan's oldest fast food.
What onigiri are not is difficult. Rice, a filling, two hands. For almost all of those two thousand years they were something you made at home, and until convenience stores appeared, buying one ready-made was not a thing people did.
7-Eleven is a case in point. The chain carried onigiri from its first store in Japan, and at the beginning it sold two or three a day.
Two changes turned that around.
The first was separating the nori from the rice. 7-Eleven introduced a film wrapper that keeps the sheet of nori apart from the rice until the moment you open it. Homemade onigiri are wrapped in advance, so the nori softens against the rice; here it stays crisp. The wrapper also meant you could roll the nori around the rice without touching it, which made onigiri genuinely portable. This wrap-it-yourself-just-before-eating type became the store's signature product, and convenience store onigiri stopped being a curiosity.
The second was tuna mayonnaise. It is said that the idea came from a developer who noticed a child eating rice topped with tuna and mayonnaise. At the time tuna mayo was rarely used as an onigiri filling. Once it became a hit, it turned into a standard, and it opened the door to fillings that no one would have made at home.
How to Open One
The wrapper is the part that confuses first-time visitors, and it is worth a moment of attention, because the whole point of the design is that crisp sheet of nori. There are three steps, and the numbers printed on the film tell you the order.
1. Pull the tab marked 1 straight down the middle of the triangle. The film splits into two halves.
2. Pull the corner marked 2 away from the rice.
3. Pull the corner marked 3 the same way. The nori wraps itself around the rice as the film comes away, and your hands never touch the rice.
The video above shows the whole thing in motion, if that is easier to follow.
The Five Classic Flavors
Salmon, umeboshi, kombu, tuna mayo and salt. These five are on the shelf all year round, and they are the ones to start with.
Salmon
Price: ¥213 (tax included)
Filled with grilled, lightly salted salmon. Salmon, rice and miso soup are a classic Japanese breakfast, and this onigiri carries that combination in one hand.
From our team
- “Subtle, yet umami-rich.”
- “Well-balanced with rice and nori.”
- “Light saltiness that stimulates the appetite.”
Umeboshi
Price: ¥178 (tax included)
Filled with tangy, sour pickled plum. Umeboshi is one of the oldest onigiri fillings, and one that many Japanese people grow up with.
From our team
- “Seedless and not too salty.”
- “Light and refreshing, with gentle acidity.”
- “Seems to use refined umeboshi.”
Kombu
Price: ¥178 (tax included)
Filled with sweet simmered kelp. Kombu is also what dashi is made from, so it brings a good deal of umami with it, and it tends to be a favorite among those who like a little sweetness.
From our team
- “Gently sweet.”
- “Kombu umami pairs well with rice, with balanced sweetness.”
- “Tender and easy to eat.”
Tuna Mayo
Price: ¥178 (tax included)
Filled with tuna mixed with mayonnaise, and the flavor 7-Eleven introduced. Creamy, umami-rich and lightly salty.
From our team
- “Better than expected.”
- “Well-seasoned, letting the rice flavor shine.”
- “Easy to pair with other dishes.”
Salt
Price: ¥145 (tax included)
A plain rice ball seasoned with salt, with no filling and no nori. Because there is nothing else in it, the rice has to carry the whole thing, which makes it the most honest item on the shelf.
From our team
- “Easy to pair with other dishes.”
- “Fluffy, with a gentle sweetness from the rice.”
- “The quality of the rice really stands out.”
Before You Buy
You can ask to warm it. At the register you may be asked whether you would like it heated. Warm rice softens the texture and brings out the sweetness; cold rice is firmer and holds together better if you are eating on the move. Neither is wrong, and both are normal.
Varieties keep expanding. The flavors here are the ones you can count on finding. Beyond them, stores rotate seasonal fillings and regional exclusives, and the shelf in Kyoto will not look quite like the shelf in Sapporo. In recent years, pricier lineups built around brand-name rice and premium ingredients have also become more common, so the price range itself has widened.
Japan Also Has Onigiri Specialty Shops
Onigiri shops built around nothing but rice balls have become popular in their own right. Bongo, in Otsuka, draws both regulars and visiting tourists, with a line that forms daily. Rather than pressing the rice into a firm shape, the rice is only lightly squeezed a few times, which gives it a softer texture than what you get at a convenience store.
If you visit Japan, start with a convenience store onigiri. If you like it, a specialty shop is worth the trip: it tends to break the assumption that onigiri are all just the same rice pressed into a ball.
Onigiri Bongo おにぎりぼんご
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