Produce

Island Shallot (Rakkyo)

Small Japanese bulb (rakkyo) pickled into a crunchy sweet-sour condiment.

Island shallot, known as rakkyo in Japan, is a small, slender allium bulb similar to a shallot or pearl onion. It is most often pickled in a sweet-and-sour brine to make crunchy amazu rakkyo, a classic accompaniment to Japanese curry. Fresh rakkyo is pungent, but pickling turns it crisp, tangy, and refreshing.

Rakkyo (Allium chinense), commonly called Japanese or island shallot, is a small white bulb vegetable cultivated in East Asia for over a thousand years—Japanese records trace its cultivation to the Heian period (794–1185). Unlike true shallots (Allium cepa var. aggregatum), rakkyo belongs to a distinct species, though the English name persists in markets. The fresh bulb measures 15–25mm in diameter—roughly the size of a large olive—with thin papery skin and a sharply pungent, garlicky bite that mellows dramatically through pickling. Modern commercial production concentrates in Saitama Prefecture's Yoshimawara district, which supplies roughly 90% of Japan's crop, prized for consistent size and balanced sweetness.

The pickled form is what most cooks encounter. Saitama rakkyo-zuke transforms the biting fresh bulb through a specific process: bulbs are blanched or par-boiled first, then soaked in seasoned liquid—typically rice vinegar, sugar, and salt—without cooking in the brine. This yields a firm, crunchy texture that holds its shape in hot noodle soups and fried dishes, unlike Western pickled onions, which soften considerably. The result is a mild, sweet-sour condiment with gentle onion character that balances salinity and crunch. A widespread Japanese belief holds that rakkyo aids digestion, attributed to its allicin content (the same compound in garlic), though this remains folk medicine rather than clinically verified.

Beyond the iconic curry rice pairing, rakkyo functions as a versatile tsukemono across Japanese cuisine—from bento boxes to tonkotsu ramen garnishes to okonomiyaki batter. Its sweet-sour crunch also travels well on Western charcuterie boards and pairs assertively with soft cheeses, making it one of the most adaptable Japanese pickles in international cooking.

Measured in: g
Storage: Fridge

Types & varieties

Saitama Rakkyo (Saitama Rakkyo-zuke)

The benchmark commercial variety; pickled in sweet rice vinegar with sugar and salt; standard for export and domestic consumption

Kuro-rakkyo (Black Rakkyo)

May involve Allium nigrum or a fermentation process; deeper, more complex flavor; a specialty from Kyoto with umami depth

Fresh Rakkyo (Raw)

Available seasonally in early summer; intensely pungent and garlicky; can be quick-pickled at home or blanched before use

Red Rakkyo

A cultivar with slight reddish tinge; less common commercially; similar flavor profile to white rakkyo

The Pickling Process

Rakkyo undergoes a two-step preservation method that distinguishes it from Western quick-pickled onions. The fresh bulbs are first blanched or par-boiled, which sets their texture and reduces surface microorganisms. They are then submerged in a seasoned liquid—rice vinegar as the base, sweetened with sugar and seasoned with salt—where they cure without further heat. This cold-soak method preserves cellular integrity, keeping the bulbs firm and crunchy through months of refrigerated storage. The brine-to-bulb ratio and exact seasoning vary by producer; Saitama-style rakkyo tends toward prominent sweetness, while Kyoto-style may include usukuchi (light soy) for added savoriness.

Never cook rakkyo in the brine—the bulbs soften and lose their defining crunch
The blanch-first method is essential; skipping it results in inferior texture and shorter shelf life
Store fully submerged in brine; exposure to air causes softening within days

Fresh vs. Pickled: When to Use Each

Fresh rakkyo appears briefly at markets in early summer and offers an entirely different experience than the pickled version. The raw bulb delivers sharp, aggressive allium heat—comparable to a concentrated garlic punch—which mellows substantially with cooking or pickling. Use fresh rakkyo when you want aggressive onion character: blended into a strong sauce, minced into a marinade, or pickled at home for a fresher, brighter result than commercial products. Pickled rakkyo serves as a finished condiment—added at the table or as a late-stage garnish where its crunch, mildness, and sweet-sour balance can function without competing flavors overwhelming it.

Fresh rakkyo: aggressive, pungent, garlicky; requires cooking or pickling to soften
Pickled rakkyo: mild, crunchy, sweet-sour; use as a condiment or garnish, not a cooking ingredient
Quick-pickle fresh rakkyo yourself for a brighter, less sweet alternative to commercial products

Common uses

Served as the defining condiment alongside Japanese curry rice (karē raisu)—the most iconic pairing in Japanese home cookingEaten as okazu (side dish) with plain steamed rice, functioning as a daily tsukemonoChopped and folded into yakisoba or okonomiyaki batter for mild onion sweetness and textural contrastAdded as a finishing garnish to noodle soups, especially tonkotsu ramen, where the crunch cuts through rich pork brothIncluded in bento boxes as a pickled vegetable component that travels well without refrigerationEaten plain as a palate-cleansing tsukemono between courses in kaiseki and Japanese restaurant mealsUsed in Western cooking as a charcuterie condiment—pairs with cured meats, pâtés, and soft cheesesFinely chopped and stirred into aioli or mayonnaise for a mild onion-forward spread without raw allium sharpness

Tips & pitfalls

Drain pickled rakkyo from the brine before serving—serving them wet makes rice and noodles soggy
Never overcook pickled rakkyo; add it at the end of cooking or use it raw as a garnish to preserve crunch
Look for firm, uniformly white bulbs with no soft spots or discoloration; texture is the primary quality indicator
Use a clean, dry utensil every time you open the jar—introducing moisture causes rapid softening and shortens shelf life
If rakkyo loses its crunch over time, blend it into salad dressings or cooking sauces rather than discarding; the flavor survives texture loss
Pair rakkyo with rich, fatty dishes—the acidity cuts through pork katsu, tonkotsu ramen, and fried foods effectively
For a punchier condiment, drain rakkyo and sauté briefly in butter until lightly caramelized at the edges
When substituting with fresh shallots, quick-pickle them in 1:1 rice vinegar and water with a pinch of sugar for 30 minutes—but expect inferior crunch

Nutrition

72kcal

Energy

301 kJ · per 100 g

Where the calories come from

Protein 13%Carbs 86%Fat 1%

Protein

2.5g

5% DV

Carbs

16.8g

6% DV

Fat

0.1g

0% DV

Fiber

3.2g

11% DV

Sugars

7.9g

of which

Sodium

12mg

1% DV

Notable micronutrients

Vitamin B620% DV

Vitamin C9% DV

Folate9% DV

Iron7% DV

Potassium7% DV

Thiamin (B1)5% DV

Source · USDA FoodData Central · Shallots, raw

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In the shops

Matched grocery products

Shallots
250 g · Mercadona
€1.75
Shallots in Mesh Bag 250 g
kg · Bonpreu
€1.59

Good to know

Scientific Name: Allium chinense (distinct from true shallot, Allium cepa var. aggregatum)
Also Known As: Japanese shallot, Chinese onion, pearl onion, rakkyo (らっきょう)
Primary Origin: East Asia; Saitama Prefecture (Yoshimawara district) produces ~90% of Japan's commercial crop
Fresh Season: Early summer (June–July in Japan)
Physical Form: White bulbs 15–25mm diameter; similar to a large olive or small marble; thin papery skin
Flavor (Pickled): Mild onion sweetness with balanced sweet-sour salinity and persistent crunch
Shelf Life: Pickled: 6–12 months refrigerated; Fresh: 1–2 weeks in cool, dry storage

Substitutes

Quick-pickled pearl onions — Similar size and crunch; soak pearl onions in 1:1 rice vinegar and water with 1 tbsp sugar per cup liquid for at least 2 hours before using
Sweet pickled cocktail onions — Flavor differs (more vinegary, less complex) but texture and sweetness are comparable; drain and use as-is
Fresh shallots, thinly sliced and quick-pickled — Won't match rakkyo's crunch or depth; acceptable as a last resort for raw applications only
Capers — Provides saltiness and briny crunch in savory applications but lacks onion character entirely; use only where flavor compatibility allows

Pairs with

Japanese curry (karē)Tonkotsu ramenPork katsu (tonkatsu)Yakisoba and okonomiyakiSteamed rice and donburi bowlsSoft cheeses (brie, camembert)Fattier beef cutsGinger Sesame oilScallions / Chives

Also called

Rakkyo · Chinese Onion · Scallion Bulb