Hassaku

Note Profile

Botanical

About

Hassaku is a Japanese citrus, a natural pomelo x mandarin hybrid found in Hiroshima Prefecture around 1860. The note is the peel and juice of the fruit. It smells like a gentler grapefruit: bright and tangy first, then sweeter and rounder, with a bitterness that never quite leaves.

Scent Profile

Citrus leads and nothing competes with it. Both descriptive sources open there: Takasago's group is citrus peel oil and Premiere Peau calls the aroma 'a bracing explosion of citrus'. The identity within citrus is grapefruit rather than orange, and that is the one claim with an analytical number behind it: nootkatone at 18.1% of the oxygenated fraction, the molecule Takasago names as grapefruit's own. Fruity is the pomelo-mandarin flesh, which Premiere Peau reads as 'freshly squeezed oranges' and Fragrantica reads as mandarin. It is held below 0.40 because it comes from prose comparisons, not measurement. Sour is the 'tangy' and 'tart' language, dropped well under lemon's level because Wikipedia states the acidity is low and Premiere Peau says the tartness has 'a gentler touch'. Below sit dry_woody for nootkatone's woody-bitter side, green, floral from the pomelo parent, sweet_vanillic for the 'underlying sweetness', and aldehydic for the zest lift. Sulphurous, not grapefruit's: no source names a thiol in hassaku and the whole point of the fruit is that it is milder. Spreads are 0.12 to 0.20 because no GC-Olfactometry descriptor list for hassaku was found, only bulk compound percentages.

ScentWheel

Breadthbroad

EnvelopeTop · ~1h lasting

Family Fresh & Citrus

Read off the wheel, not a label applied to the note.

Origin

Citrus hassaku, the fourth most cultivated citrus in Japan by production volume (Takasago). The fruit has a thick peel, hard flesh and little juice, but low acidity. It is picked in winter and eaten weeks or months later, once the post-harvest bitterness has softened (Wikipedia). Takasago's own GC/MS work on Japanese citrus varieties puts nootkatone at 18.1% of hassaku's oxygenated aroma fraction, and names nootkatone directly as the characteristic aroma compound of grapefruit. Natsu mikan shares that trait at 11.4%. Iyokan, Kiyomi, Shiranui and Sanbokan in the same study do not. As with all citrus, the bulk of the volatiles are terpene hydrocarbons such as limonene, and the character sits in the small oxygenated remainder.

Usage in Perfumery

One Fragrantica attestation and no Parfumo placements, so this is a rarely used note. It works where a grapefruit opening is wanted without grapefruit's sulphurous bite: the same bitter-fresh direction, softer and sweeter. Fragrantica's own gloss compares it to mandarin orange, which fits the parentage more than the chemistry.