Japan (Tokushima Prefecture, Shikoku island — 98% of global production)
Pyramid
Top
Crushed lime leaves on a wet stone — green, aldehydic, faintly spiced. Not the fruit but the leaf. Sudachi peel oil is 69% limonene yet smells nothing like orange: the 7.5% gamma-terpinene and trace aldehydes (octanal, decanal, dodecanal) bend it toward something sharper, greener, with a cumin-like edge that no other citrus delivers.
Immediate lime-leaf sharpness with a metallic, almost stinging aldehydic edge — closer to citronella or lemongrass than to expressed lime. Behind the green attack, a cumin-like spiced note (from cumin aldehyde traces) and a faint waxy sweetness (linalool at ~2%). Less round than bergamot, less tropical than yuzu, more angular and herbaceous than any other expressed citrus oil. In the drydown, a subtle earthy-mushroom quality from dill ether and quercus lactone traces. The overall impression is of green sharpness tempered by unexpected spice — a citrus that smells more like a herb than a fruit.
Evolution over time
Immediately
Immediately
Sharp, green, aldehydic attack. Lime-leaf sharpness with a metallic, almost stinging edge. Cumin-like spiced note surfaces immediately — savoury and angular, unlike any other citrus opening.
After a few hours
After a few hours
Green intensity softens. Linalool's waxy-floral undertone emerges. The spiced cumin facet recedes to a dry, herbaceous warmth. Terpenic backbone (gamma-terpinene, beta-phellandrene) becomes more perceptible.
After a few days
After a few days
Faint, dry, clean trace. A subtle mushroom-earthy note from dill ether and quercus lactones. More tenacious than expressed lime but shorter-lived than bergamot. The residue is woody-green, not sweet.
Terroir & Expressions
Indicative 2025 wholesale prices.
The Full Story
Sudachi (Citrus sudachi Hort. ex Shirai) is a small green citrus fruit endemic to Tokushima Prefecture on Shikoku island, Japan, where 98% of global production occurs. The fruit weighs roughly 25 grams — golf-ball-sized — and is harvested unripe in late summer. Genetically, it is a natural hybrid of yuzu (a papeda cross) and a mandarin relative close to koji and tachibana orange. Mitsutaro Shirai published the species name in 1933, though modern taxonomy treats it as a cultivar of hybrid origin rather than a distinct species. Tokushima farmers have cultivated sudachi since at least the Edo period (1603–1868), originally as a vinegar substitute.
Scent Profile
The peel oil opens with an aggressive lime-leaf greenness — sharper than bergamot, less sweet than mandarin, with a metallic citronella-adjacent edge. A cuminic aldehyde note surfaces almost immediately, giving sudachi a spiced, savoury dimension absent from other expressed citrus oils. As it develops, a faint waxy-floral undertone from linalool softens the attack, but the green-aldehydic character persists. The drydown is clean and dry, with a trace of mushroom-like earthiness attributed to quercus lactones and dill ether — trace compounds identified by Sawamura et al. in their 1997 odor-threshold study.
Chemistry
GC-MS analysis (Njoroge & Ukeda, 1995, Flavour and Fragrance Journal) identified 83 volatile constituents in cold-pressed sudachi peel oil. Monoterpene hydrocarbons dominate at 89.7%: (4R)-(+)-limonene (69.0%), gamma-terpinene (7.5%), beta-phellandrene (7.2%), myrcene, and alpha-pinene. Sesquiterpene hydrocarbons account for 8.4%, with beta-elemene (2.8%) and trans-trans-alpha-farnesene (2.2%) the most abundant. Oxygenated compounds are minor but olfactively decisive: linalool, octanal, decanal, dodecanal, citronellal, and 1,8-cineole all register above odor-detection thresholds. Enantioselective analysis (Sawamura et al.) demonstrated that the two optical isomers of linalool and alpha-pinene in sudachi oil differ significantly in both odor threshold and odor quality — the (3S)-(+)-linalool isomer contributing a distinctly different character than its (3R) counterpart.
Perfumery Use
Sudachi oil remains niche in Western perfumery but is gaining traction among perfumers seeking a citrus top note that reads green-spiced rather than fruity-sweet. It pairs structurally with bergamot, cedrat, and yuzu, and blends effectively with aromatic herbs and woody bases. Its limonene content, while high, is accompanied by sufficient gamma-terpinene and beta-phellandrene to give it a terpenic angularity that straight lemon or lime oils lack.
What does sudachi smell like
A tiny Japanese citrus (Citrus sudachi) with the tartness of lime but a more complex, aromatic character. The peel releases a sharp, green citrus oil that is brighter than yuzu, less bitter than grapefru it, and carries a faint herbaceous-thyme note from strengthens thymol content. In Japanese cuisine, sudachi replaces lem on and lime — its arom a is the smell of grilled fish, cold sob a, autumn in Tokushim a prefecture. In perfumery, sudachi adds an angular, complexity citrus note that avoids the banality of lem on.
Sudachi contains a polymethoxyflavone called sudachitin (5,7,4'-trihydroxy-6,8,3'-trimethoxyflavone), a compound named after the fruit itself. A 2022 study published in the Journal of Nutritional Science and Vitaminology demonstrated that sudachi peel essential oil suppresses T cell activation both in vitro and in vivo — making it one of the few citrus oils with documented immunosuppressive properties in peer-reviewed literature.
Extraction & Chemistry
Extraction method: Cold expression (pressing) of the unripe green peel. Sudachi fruits are harvested in late summer before ripening. The peel is mechanically pressed to rupture oil glands, and the resulting emulsion is centrifuged to separate the essential oil from juice and cellular debris. Yield data specific to sudachi cold-pressed oil is not widely published in Western literature, though typical citrus peel expression yields range 0.3–0.8% by fruit weight. Steam distillation of the peel produces a separate product with a somewhat different terpene profile. The cold-pressed oil retains the full aldehyde complement (octanal, decanal, dodecanal) responsible for sudachi's characteristic sharp, green opening — these lighter compounds are partially lost in steam distillation. Major production: Tokushima Prefecture, Japan (98% of global sudachi cultivation). Oil is primarily produced by Japanese specialty houses including Ogawa & Co. (est. 1893, Japan's oldest flavour and fragrance company).
Contains limonene (69%), linalool, and citronellal — individually restricted allergens under EU Regulation 2023/1545, requiring label declaration above threshold. FEMA GRAS number 4863 (CAS 2182693-24-7).
Synonyms
SUDACHI · CITRUS SUDACHI HORT. EX SHIRAI · JAPANESE SUDACHI LIME · TOKUSHIMA CITRUS · SUDACHI OIL (FEMA 4863)
Physical Properties
Odor Strength
High
Lasting Power
24 hours
Appearance
Yellow to golden mobile liquid
Specific Gravity
0.842–0.850 @ 20 °C
In Perfumery
Top-note modifier and citrus individualiser. Sudachi peel oil occupies a narrow but useful positi on: it reads as citrus but delivers a green-spiced, aldehydic character that limonene-dominated oils like sweet orange or lem on cannot provide. Its gamm a-terpinene and bet a-phellandrene content (7.5% and 7.2% respectively) give it a terpenic angularity, while trace aldehydes (octanal, decanal, dodecanal) provide the sharp, almost metallic opening. In formulati on, sudachi blends naturally with bergamot, cedr at, yuzu, and petitgra in. It anchors hesperidic openings with more structural interest than a straight lime note, and introduces a savoury-spiced dimensi on that bridges citrus top notes with aromatic heart materials like basil, clary sage, or black pepper. The cum in aldehyde trace is its signature — no other expressed citrus oil delivers that specific spiced quality. IFRA status: contains limonene (69%) and linalool, both restricted allergens under EU Regulati on 2023/1545 requiring label declarati on above threshold concentrations. FEMA GRAS number 4863 (CAS 2182693-24-7). Usage levels in fine fragrance typically range 0.5–3% of concentrate.
