Negitoro Onigiri (Minced Tuna & Green Onion Rice Ball): Inspired by Haikyu!! (gluten free)

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*minor manga spoilers* 

I’m really excited for today’s recipe because I am recreating food from the Haikyu!! manga!

Samu made Tsumus favourite Negitoro Onigiri, so that’s exactly what we’re going to make! Onigiri are simple to make and really delicious. I find the smell and texture of warm rice and seaweed to be one of the most comforting things!

Check out this panel from the manga!

I love onigiri so much! Honestly I could eat them every day, and I may have done that before, for like 3 weeks… 

Don’t mind me, day dreaming about being back in Japan and picking up fresh onigiri every morning *cue dreamy sigh*

But what I wouldn’t give to eat at Onigiri Miya!

Ok so this was not my first attempt at this recipe but I am so happy with the final result. Originally, I did more of a chopped tuna that I then marinated in a soy sauce green onion sauce. It was good, don’t get me wrong, but it wasn’t quite right. 

Instead, I minced fresh tuna, mixed it with soy sauce, sesame oil, mirin, and green onion and it turned into a perfect filling for Onigiri. It’s no surprise that it is Tsumu’s favourite!

Next I’ll have to make Umeboshi Onigiri for Kiyoomi (iykyk). I’m a huge fan of these two!

I really hope you make these onigiri for yourself! If you’re worried about shaping them, don’t be! It took me some time (and watching a lot of masters make onigiri to get really comfortable with it) to get comfortable with it. You can always buy a mold to use to help you get the perfect shape! They’re pretty cheap and easy to find.  

Here’s a link to a few onigiri molds you could check out:

If you make this recipe, I would absolutely love to hear your feedback and would love to talk to you all some more so please leave a comment! Also, if you do make this recipe, I’d really love to see your creations so please tag me on Instagram.


If you have any requests for inspired/themed recipes that you’d like to see, please let me know!

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Negitoro Onigiri (Minced Tuna & Green Onion Rice Ball): Inspired by Haikyu!!

I’m recreating food from the Haikyu!! manga, Negitoro Onigiri for Miya Atsumu! Onigiri are simple to make and really delicious. Minced tuna, mixed with soy sauce, sesame oil, mirin, and green onion is a perfect filling for Onigiri, so it’s no surprise that it is Tsumu’s favourite!
Cook Time 20 minutes
Course Dinner, Lunch, Main Course, Snack
Cuisine Japanese
Servings 8


  • 288 g sushi-grade tuna minced into a paste
  • 1-2 scallions thinly sliced
  • 3/4 Tbsp gluten free soy sauce
  • 1 1/2 tsp sesame oil
  • 1 tsp mirin
  • Sesame seeds
  • Salt
  • Fresh steamed Japanese rice
  • Nori seaweed


  • Wash rice thoroughly and cook
  • Make a very small bowl of salt and sesame seeds
  • Mince the tuna with a knife and in a medium bowl, mix the tuna with the soy sauce, sesame oil, and sliced green onions
  • Use a paddle to cut the rice and let in a lot of air so it fluffs it up. Let cool slightly so you can handle the rice
  • Make a ball of rice (about 1/3 or 1/2 cup), make a hole in the middle, add in a large spoonful of filling. Top with a bit more rice to close the ball.
  • With damp hands, dip a finger into the sesame salt mix and rub into your palms.
  • Take the ball and press the rice ball into shape. (try doing this as few times as possible, the tighter you press the rice ball, the harder the rice ball will be.
  • Make your hands into a triangle shape and press the sides into form, rotate each time.
  • * Optionally, you can use a mold to do this!
  • Lay half piece of nori down on your work surface. Stand the onigiri in the middle, lay it down and fold the nori over. Tuck in the edges, and roll to it's side so an open segment is on top.
  • Add a bit more of your filling on the top, serve and enjoy! These are best when they are fresh and warm.
  • Depending on the size you make each rice ball, you will be able to make more or less onigiri with your ingredients.
Keyword Anime, Bento, Comfort Food, Easy, Onigiri

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