Peanut miso (Bongo) onigiri
A home version inspired by the shop filling named above. The shops do not publish their recipes; these quantities are this site's own. This page makes one filling, then shapes and serves it. Start with plain cooked Japanese short-grain rice: rice cooking, hand shaping and all shop fillings →. The filling preparation time below excludes cooking the rice.

Step by step
Filling

Toast the peanuts in a dry pan over medium-low heat for 2–3 minutes. 
Add the mixed miso seasoning and stir over low heat for 2 minutes until the glaze clings to the nuts. 1Peanut miso
medium-low~6 minFor this step
- Roasted unsalted peanuts60 g
- Miso1½ tbsp
- Sugar (peanut miso)1½ tbsp
- Mirin (peanut miso)1 tbsp
- Water (peanut miso)1 tbsp
- Toast the peanuts in a dry pan over medium-low heat until fragrant, 2–3 minutes.
- Stir the miso, sugar, mirin and water together, pour it over the peanuts and stir over low heat until the miso turns glossy and clings to every nut, 2 minutes.
- Spread on a plate to cool. It sets sticky; break it up before using.

Should look like this Shape by hand

Sticky miso-coated peanuts in the well; close the rice loosely around them. 2Shape them shop style
~2 min eachFor this step
- Cooked rice, from the onigiri page480–720 g (120 g each)
- Kosher salt (for your hands)a little for each onigiri
- Have the cooked rice ready, covered, and cool it only until comfortable to hold. Wet your hands and rub a little salt over both palms.
- For each onigiri, put about 60 g rice in your palm, make a well and add a heaped tablespoon of filling. Cover with another 60 g rice and gently close the rice around it. Save any extra filling separately.
- Cup the rice from below with one hand. Bend the other hand into a roof, press gently to make a corner, turn a third of a turn and repeat. Keep it loose: press only enough to hold together.

Should look like this Finish

3Wrap and serve
For this step
- Nori strips4–6
- For the shop-style finish, set a little of the same filling on top so you can see what is inside. Leave the top uncovered by nori.
- Wrap one strip of nori around the base and up the sides just before serving. Eat within the hour while the nori is crisp. The sliced example shows the inside; cutting yours open is optional.
Based on: Hidden Japan Gems — Onigiri Bongo menu · MICHELIN Guide — Onigiri Asakusa Yadoroku · Asakusa Yadoroku (official) · Nigihaya, Kyoto (official, Japanese) · Togoshi-ya (official, Japanese)