Japan — cultivated from ancient times; wild varieties native to the Himalayas and China; ao-jiso cultivation in Japan from the Nara period; integral to Edo-period sushi and sashimi culture
Shiso (Perilla frutescens var. crispa) is Japan's most characteristic aromatic herb — simultaneously refreshing, slightly anise-like, minty, and faintly citric. Two main varieties: ao-jiso (green shiso), the most commonly used, with scalloped bright green leaves; and aka-jiso (red/purple shiso), used primarily for pickling (giving umeboshi and pickled ginger their red colour) and occasionally in salads. Shiso appears across the full culinary spectrum: as a sashimi garnish (chiffonade or whole leaf), as a tempura ingredient (leaf tempura is a summer classic), as a wrapper for onigiri fillings, in the flavouring of shiso-infused ponzu, as a pickling aromatic, and as a topping for Japanese pasta, cold soba, and chilled tofu.
Refreshing, slightly anise-forward, minty, faintly citric, with an herbal sharpness that cleanses the palate between rich bites
Shiso's aromatic compounds are most volatile and intense in the leaf — handle gently and use as fresh as possible. For chiffonade: stack several leaves, roll tightly, and slice into fine ribbons; submerge briefly in ice water to prevent browning, drain, and pat dry. Do not use metal until just before serving — shiso oxidises rapidly on cut surfaces. Red shiso contains anthocyanins and perillaldehyde, making it more strongly aromatic than green; it turns pickling brine bright pink through anthocyanin reaction with the acidic umeboshi environment.
Grow shiso in a pot on a sunny windowsill for year-round availability — it grows enthusiastically in warm conditions. A shiso-infused ponzu (shiso leaves steeped in ponzu for 24 hours then strained) is an exceptional dipping sauce for delicate white fish. The scent of shiso is released by rubbing the leaf between the palms before garnishing — this activates the volatile oil glands and enhances the aromatic experience. For shiso tempura: dust the rough side of the leaf lightly in flour before applying batter to improve adhesion.
Preparing shiso chiffonade too far in advance — it browns at cut edges within 20–30 minutes of exposure to air. Over-wilting by submerging in warm water. Using stems along with leaves in sashimi presentation — only the leaf is used for garnish. Treating red and green shiso as interchangeable — their aromatic profiles and appropriate applications differ significantly.
Tsuji, Shizuo — Japanese Cooking: A Simple Art; Hosking, Richard — A Dictionary of Japanese Food