Japanese Mochi Rice Confectionery Nerikiri and High Wagashi Design

Ingredients

• 500 g Shiroan, white bean paste, cooked and strained
• 30 g Shiratama flour, glutinous rice starch; or substitute grated yamaimo mountain yam for alternate elasticity
• For the filling
• 200 g An, sweet bean paste or chestnut paste, portioned into 12 balls
• For natural colouring
• as needed Matcha powder, for green
• as needed Gardenia extract, kuchinashi; for yellow
• as needed Beni safflower extract, for pink-red; dilute gradually — full concentration produces orange
• as needed Shiso extract, for purple

Method

1. 1
   Bring the shiroan to room temperature if it has rested cold — cold paste is less plastic and will not homogenise evenly. Turn the paste onto a clean work surface or into a wide, heavy pan. Work or heat gently, folding continuously, until the moisture content is calibrated: the paste must hold a thumbprint cleanly, neither sticking to the finger nor collapsing at the centre. This is the working window; proceed immediately.
2. 2
   Incorporate the shiratama flour by dissolving it in the minimum water required to form a smooth slurry, then kneading it into the warm shiroan in stages. Work only until the paste is uniform and elastic — do not over-knead. Excessive working develops gluten in the flour base and reduces plasticity. The finished nerikiri base should stretch slightly without tearing and release from the hands cleanly.
3. 3
   Divide the base into portions according to the number of colours required for the chosen seasonal design. Introduce colouring materials one at a time, kneading each portion until the colour is fully homogenised with no streaking visible. Use no more than three colours in a single piece. Where beni safflower red is used, build concentration in gradual additions — the target is pink, not orange.
4. 4
   Flatten each outer portion of coloured nerikiri base to a disc roughly 7–8 cm across. Place one pre-portioned an filling ball at the centre. Draw the nerikiri disc up and around the filling, pinching the seam closed at the base and rolling gently between the palms to form a smooth sphere. The surface must be taut and uncracked; any fissuring indicates the base is too dry.
5. 5
   Shape and tool the exterior according to the seasonal design. For chrysanthemum (kiku): using a single bamboo nerikiri-hera or skewer, press 12 to 16 petal lines into the sphere from the equator toward the crown, applying controlled, even pressure at each stroke. For hydrangea (ajisai): press small cubes of two-tone blue-purple paste through a fine-mesh sieve and cluster the extruded petals over the base sphere. For sakura: use a press mould. Each tool mark must be resolved in a single, committed movement — reworked lines lose definition.
6. 6
   Transfer finished pieces to individual paper or lacquer boards. Do not refrigerate. Nerikiri must be served and consumed on the day of production at room temperature; moisture migrates from the bean paste over time, causing surface weeping that damages both texture and design. Present alongside usucha thin matcha, not koicha.