If you ever visit Japan and want to sample one of the staples of local cuisine, find a convenience store and grab an onigiri, or rice ball. Easy to make, plentiful in variety and an essential component of any bento lunch, the onigiri is to Japan what the sandwich is to the West.
But with so many different fillings, how do you know which onigiri to try out? If you want a taste of the REAL Japan, you need to eat what REAL Japanese people are eating, which is why we’d like to share with you this REAL list ranking the most popular onigiri fillings in Japan.
The list comes from a survey taken last month by Japanese internet research group My Voice, which polled 11,581 people about what food they like to stuff in their balls of rice. The results are as follows:
1. Salmon – 66.9%
2. Tarako (salted cod roe) – 48.7%
3. Mentaiko (seasoned cod roe) – 47.8%
4. Tuna & mayonnaise – 47.2%
5. Konbu (dried kelp) – 42.2%
6. Umeboshi (dried Japanese plum) – 41.1%
7. Katsuo (dried bonito) – 36.3%
8. Takikomi gohan (seasoned rice steamed with vegetables, meat or fish) – 30.8%
9. Baked onigiri – 30.1%
10. Takana (leaf mustard) – 29.0%
11. Tenpura – 26.6%
12. Ikura (salted salmon roe) – 25.7%
13. Osekihan (rice steamed with red adzuki beans) – 21.3%
14. Minced chicken – 20.0%
15. Fried rice – 15.6%
16. Nikumaki onigiri (pork soaked in a soy sauce base) – 15.1%
17. Salt (no fillings, just salted rice. It’s better than it sounds.) – 14.7%
18. Grilled beef rib – 14.4%
19. Stewed pork – 12.1%
20. Eel – 9.2%
21. Omelette & ketchup – 9.1 %
22. Cheese – 4.4%
23. Other – 3.7%
In addition to fillings, participants were also asked a number of questions related to their onigiri eating habits.
For example, while 99% of participants answered that they like onigiri (told you everyone eats them!), 62% of them said they “more or less” like it whereas only 35% said they are “extremely fond of” the food.
85% of participants said they buy onigiri at convenience stores (as opposed to supermarkets-and believe me, they’re no good) and 76% said that when they eat onigiri, it’s during lunch.
One interesting finding was that while 62% of people said they would eat an onigiri made by someone they know, only 30% said they would eat the onigiri crafted by an unfamiliar or unknown hand, surely the legacy of 16th century ninja poison rice ball assassinations.
Source: DietClub

Convenience store onigiri rice balls become even more expensive…but are they worth it?
The 10 best types of onigiri rice balls to try in Japan【Survey】
As rumors swirl of 7-Eleven shorting customers on rice ball fillings, we check on their sujiko
What are Japan’s best, and most unique, regional rice balls?
Say hello to the Big Bomb Onigiri, a beast of a Japanese rice ball
Cup Noodle unveils first-ever cold-water instant ramen in Japan
Japanese government ID card and app to be required for certain Pokémon card purchases next month
Studio Ghibli releases new Totoro coin purses…but who’s the blue character?
Tokyo’s Giga Mart lets visitors “steal” from a convenience store… if cameras don’t catch you
Studio Ghibli has a new anime out, and there’s only one place in the world where you can see it
Hiker needs to be rescued from Mt. Fuji two times in two days, but system is working as intended
Starbucks Japan adds shaved ice desserts to the menu at select locations
Uniqlo looks back to the very start of Pokémon with new black-and-white pixel art T-shirts[Pics]
Japan’s new Calpis pudding: The right call for summer, or tampering with purin perfection?
Studio Ghibli brings anime characters to the table with new Totoro placemat that’s like a movie cell
Family Mart opens new “Famima” flagship store in Tokyo that’s like a tourist attraction
Japan reacts to Donald Trump’s “Islamic Republic of Japan” remark
Japanese airport rebrands itself as “Sushi Airport” to attract foreign tourists
Three new starter Pokémon Jets to fly in Japan, first begins carrying passengers this month
New Mt. Fuji overnight bus takes travelers from downtown Tokyo straight to the most popular hiking trail
Tokyo revises accommodation tax amidst tourism boom, Airbnb rentals now included
Yoshinoya and Dragon Quest slaying scalpers with shift to made-to-order collaboration merch
Tochigi man shares his family’s process for creating 16 years worth of rice paddy art
Japan announces sudden 400-percent increase in visa fees for foreigners entering the country
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
Studio Ghibli store Donguri Republic announces opening of first-ever store in America
Japan triples departure tax, foreign tourists and locals now must pay more to leave country
Japan launches first overnight Shinkansen bullet train between Tokyo and Osaka this summer
Japanese sweets shop sells an ohagi so exquisite it sells out by noon
Sanrio Character Poll announces winners, Hello Kitty absent from top 10 in many countries
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
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
Which Japanese convenience store sells the best onigiri rice balls?【Taste test】
The difference between onigiri rice balls in Tokyo and Osaka
Which convenience store onigiri rice balls are the most popular? Survey reveals surprising results
Bizarre or brilliant? Takoyaki and okonomiyaki rice balls available in convenience stores now
Rice balls aplenty at the Ministop senbero, but with a special twist【Japan’s Best Home Senbero】
Japanese convenience store packs a whole bento into an onigiri rice ball
Lawson now sells old rice as “vintage” onigiri in Japan
The nine best onigiri fillings as chosen by an American
Which Japanese convenience store has the best plain onigiri rice balls?
Onikun: Epic onigiri so big they’re half demon, half rice ball
Made-to-order onigiri rice ball hotel breakfast buffet in Tokyo is open (and awesome) to all
7-Eleven under fire in Japan for mysterious holes in their onigiri rice balls
Tapioca onigiri brings boba to the world of rice balls
The Big Bomb Onigiri Japanese rice ball helps us conquer mountain race but conquers us in the end
Japanese convenience store brings rice balls back to 100 yen – Is this deal worth it?[Taste test]
Problem solved: How to open a Japanese convenience store onigiri rice ball【Pics and video】
Cutest rice balls ever? Adorable new onigiri shop opening in downtown Tokyo【Photos】