Japanese Shiso Perilla Applications Aojiso Akajiso and the Bicolour Herb Philosophy

Japan (national; originally introduced from China; cultivated since ancient times)

Shiso (紫蘇 — perilla, Perilla frutescens) is Japan's most versatile aromatic herb, existing in two primary varieties with distinct applications. Aojiso (青紫蘇 — green shiso): the more commonly used fresh herb with a complex flavour combining mint, basil, anise, and citrus — a genuinely unique aromatic profile without Western equivalent. Used whole as a wrapping leaf for sashimi, chiffonaded as a garnish, deep-fried in tempura batter, or pounded into dressings. Akajiso (赤紫蘇 — red shiso): the red-purple variety essential for umeboshi production — the red pigment (perillaldehyde and anthocyanin) from akajiso leaves turns pickled plums their characteristic magenta colour. Also used for akajiso juice (shiso syrup), red shiso furikake, and shibazuke (Kyoto's purple pickles of eggplant and cucumber). The fragrance compounds in shiso — perillaldehyde (the primary aroma compound), limonene, and linalool — degrade rapidly; shiso should be torn or cut immediately before use. Pre-cut shiso sitting more than 30 minutes loses 70% of its fragrance intensity.

Aojiso: minty, basil-adjacent, anise, bright citrus, cooling; akajiso: more camphor-like, less citrus, strongly pigmented — two distinct flavour profiles from the same plant species