Shiso

What is Shiso?

Shiso is a cultivated herb belonging to the mint family, distinguished by its broad, serrated leaves. The plant produces several leaf varieties, including flat green, ruffled red, and bicolor types with purple undersides. The distinctive scent and taste come from perillaldehyde, a compound that gives the herb a sharp, herbal, and slightly citrusy profile. While wild varieties exist, they lack this pleasant fragrance and contain toxic compounds. The leaves are tender and are typically used fresh rather than cooked extensively, as heat diminishes their aromatic qualities.

Where does Shiso come from?

The plant originates from the mountainous areas of China and India, though some accounts suggest Southeast Asian roots. It was documented in ancient Chinese medical texts around 500 AD under the name su. The herb traveled to Japan between the eighth and ninth centuries, where it became deeply integrated into local culinary traditions. From Japan, it spread to Korea and Vietnam, adapting to regional tastes. Western botanists encountered the red-leaf variety in the nineteenth century, initially classifying it under different scientific names before settling on Perilla frutescens.

What does Shiso taste like?

The primary flavor driver is perillaldehyde, which provides a pungent, herbal note reminiscent of basil but with a sharper, more citrus-like edge. Red varieties often possess a deeper, slightly metallic taste compared to the brighter green leaves. The plant also contains perillartine, an extremely sweet compound, though it is not used for food sweetness due to its bitter aftertaste. Wild shiso contains perilla ketone, which is toxic to livestock and imparts an unpleasant flavor, distinguishing it from the safe, cultivated garden varieties.

How Shiso is grown and processed

Shiso is an annual plant in temperate climates, though it can survive as a perennial in warmer zones. It thrives in warm conditions and is sensitive to frost. In Japan, major production occurs in Aichi Prefecture, particularly in Toyohashi, where greenhouse cultivation allows for year-round supply. The seeds have low viability after long storage, requiring fresh planting. Harvesting involves picking young leaves to maintain tenderness, with larger mature leaves often reserved for pickling or drying.

How Shiso is used

In Japan, green shiso (ōba) serves as a garnish for sashimi, noodles, and tofu dishes, while red shiso colors umeboshi (pickled plums) and creates yukari seasoning when dried and mixed with salt. It is also used in sushi preparations and summer beverages. In China, it accompanies fish and crab to balance flavors. Korean cuisine uses it as a wrapping leaf for meats. Vietnamese cooking incorporates it into soups, salads, and stir-fries, particularly with seafood. The seeds are sometimes preserved or pressed for oil.

Shiso in the world's kitchens

Japanese cuisine relies heavily on both green and red varieties for visual contrast and flavor enhancement. Chinese cooking uses it primarily with seafood to offset richness. Korean cuisine employs it as a ssam wrap vegetable. Vietnamese recipes use its strong aroma to elevate shrimp and fish dishes. Laotian cuisine adds it to rice vermicelli soups. Each region adapts the herb differently, from fresh garnishes to fermented condiments.

Traditional and medicinal use

Traditional medicine in China recorded its use around 500 AD. It is traditionally believed to help reduce grease in heavy meals and offset potential toxins in seafood. However, wild varieties contain perilla ketone, which causes pulmonary edema in livestock and remains understudied in humans. Cultivated varieties are considered safe for consumption, with bactericidal properties attributed to terpenes like perilla alcohol.

The trade in Shiso

Japan dominates commercial production, with Aichi Prefecture supplying over half the national output through greenhouse methods. The trade expanded significantly in the 1960s with the industrialization of green shiso cultivation. Refrigerated transport later enabled widespread distribution of fresh leaves to urban centers. Historically, red shiso was introduced to Europe in the mid-nineteenth century, where it faced criticism for overuse before being replaced by other ornamental plants.

Meal

This herb appears across various meal types. It is a staple garnish for lunch and dinner dishes like sashimi and noodle soups. It features in preserves such as umeboshi and pickled vegetables. Summer drinks utilize shiso for flavoring, and it occasionally appears in street-food contexts as a fresh accompaniment to grilled items or rice dishes.

Blends with Shiso

Questions people ask about Shiso

Good reading and sources

• Shiso on WikipediaEncyclopedia
• More photos on Wikimedia CommonsPhotos and video
• Wikidata recordOpen data