Fresh green shiso leaves displayed at a Japanese market

Japan Shiso Guide 2025: The Herb That Defines Japanese Cuisine

No herb is more distinctly Japanese than shiso. From the garnish leaf beneath sashimi to the red shiso that colors every jar of umeboshi, this aromatic perilla has shaped Japanese food culture for centuries. This guide covers the two main varieties, their culinary applications, where to taste the best shiso dishes across Japan, and how to grow your own.

Explore Tokyo's Food Culture

Stay in Tokyo to explore Tsukiji, Nishiki-equivalent markets, and sushi restaurants where shiso plays a starring role.

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What is Shiso

Shiso (紫蘇) is a leafy herb from the mint family (Lamiaceae) native to Asia, cultivated in Japan for over a thousand years. Known in English as perilla or beefsteak plant, shiso has a complex aromatic flavor profile that sets it apart from any Western herb — simultaneously minty, anise-like, slightly citrusy, and faintly peppery.

Shiso at a Glance

Botanical name

Perilla frutescens var. crispa

Japanese name

Shiso (紫蘇) / Ōba (大葉) for green variety

Flavor

Minty, anise, citrus, faintly peppery

Season

Summer peak (June–September); greenhouse year-round

Varieties

Green (ao-jiso) and red/purple (aka-jiso)

Nutritional notes

Rich in vitamins A, C, K; antioxidant rosmarinic acid

Shiso plays a dual role in Japanese cuisine: it functions as both a flavor enhancer and a food safety agent. The herb has natural antimicrobial properties that historically made it valuable as a garnish for raw fish — a practical origin that evolved into a deeply aesthetic culinary tradition.

Green vs Red Shiso

The two main varieties look and taste quite different, and are used in entirely different culinary contexts:

Green Shiso (Ao-jiso / Ōba)

• Bright green, serrated leaves with a fresh, aromatic flavor
• The most common variety in Japanese cooking
• Used fresh as sashimi garnish, in salads, as tempura, wrapping onigiri
• Available year-round in Japanese supermarkets
• Flavor: minty-anise-citrus combination
• Often called “ōba” in supermarkets (technically the same plant)

Red Shiso (Aka-jiso)

• Deep purple-red leaves with a stronger, more intense flavor
• Primary use: coloring and flavoring umeboshi (pickled plum)
• Also used in yukari (red shiso furikake seasoning)
• Seasonal — most available in June–July during umeboshi-making season
• Flavor: more bitter and earthy than green shiso
• The anthocyanin pigment turns beautiful pink-red in acidic environments

A third variety — ruffled or crinkled shiso (縮れ紫蘇, chirimen-jiso) — is used primarily as a decorative garnish in high-end kaiseki cuisine. Its crinkled texture catches light beautifully when plating sashimi and seasonal appetizers.

Shiso in Japanese Cooking

Shiso appears across the entire spectrum of Japanese cuisine — from the simplest home-cooked rice dish to the most elaborate multi-course kaiseki meal:

Sashimi Garnish

The most iconic use — a single green shiso leaf placed beneath sliced raw fish provides visual contrast, flavor counterpoint, and traditional antimicrobial protection. The leaf is edible; warp a piece of fish in it for a complete bite. Upscale sushi restaurants may use chirimen-jiso for a more dramatic presentation.

Shiso Tempura

Green shiso leaves dipped in light tempura batter and fried for 20 seconds produce a delicate, crispy fritter with a fragrant interior. A staple at tempura restaurants — almost always on the menu. Eaten immediately after frying with a squeeze of lemon or dipped in tentsuyu (dipping broth).

Shiso Onigiri

Rice balls wrapped in a shiso leaf, or with shiso mixed into the rice. Konbini (convenience stores) sell shiso-flavored onigiri year-round — look for “大葉” (ōba) on the label. A refreshing alternative to the ubiquitous tuna-mayo and salmon varieties.

Umeboshi & Yukari

Red shiso is essential to traditional umeboshi — the leaves are packed with the salted plums during fermentation, lending both color and flavor. Dried, the spent red shiso leaves are ground into yukari, a salty-sour purple furikake that's sprinkled on rice or mixed into rice balls.

Where to Taste Shiso Dishes

Shiso is omnipresent in Japan — here's where to seek out the best shiso-forward dishes:

Tempura Restaurants (Tokyo & Kyoto)

Best for tempura

Counter-seating tempura restaurants (tenpura-ya) fry shiso leaves to order — you eat each piece the moment it comes out. Tokyo's Asakusa district has several excellent tempura specialists; Kyoto's kaiseki restaurants often include shiso tempura in seasonal tasting courses.

Sushi Restaurants

Best for garnish

Any sushi restaurant uses shiso as garnish — but at Edomae (traditional Tokyo-style) sushi restaurants, the shiso leaf is freshly sourced and central to presentation. Ask for “shiso maki” (shiso roll) at kaiten (conveyor belt) sushi for a direct shiso experience.

Konbini Onigiri Section

Easiest access

The most accessible shiso experience in Japan: 7-Eleven, Lawson, and FamilyMart all sell shiso (ōba) onigiri for ¥120–¥160. The flavor is subtle but genuine. This is the everyday form of shiso for millions of Japanese people.

Growing Your Own Shiso

Shiso is one of the easiest Japanese herbs to grow at home — whether in Japan or back in your home country. Understanding the plant helps you appreciate why it's so central to Japanese cuisine.

Growing Basics

• Climate: warm, humid summers — thrives in Japan's summer conditions (25–35°C)
• Sunlight: full sun to partial shade; too much direct afternoon sun stresses leaves
• Soil: rich, well-draining; slightly acidic pH 5.5–6.5
• Water: consistent moisture; does not tolerate drought but hates waterlogged roots
• Seeds: sow after last frost; cold-stratification helps germination rate
• Harvest: begin harvesting individual leaves when plant has 6+ leaf pairs; pinch flower buds to extend leaf production

In Japan: Kitchen Gardens & Balconies

Shiso seeds and seedlings are sold at every home center and garden shop across Japan (Cainz, Komeri, Kohnan) for ¥100–¥300 per packet. Many Japanese households grow a pot of shiso on the balcony for fresh summer leaves. Seeds self-sow prolifically — one plant produces hundreds of seeds that return next year without replanting.

Frequently Asked Questions

What does shiso taste like?▼

Shiso has a complex, distinctive flavor that is difficult to compare directly to any single Western herb. The closest approximation is a combination of fresh mint, anise (licorice), basil, and a faint citrus note. Red shiso is more bitter and earthy than green shiso. The taste is refreshing and herbal without being overwhelming — it brightens raw fish and adds aromatic complexity to rice dishes.

Is shiso the same as perilla?▼

Yes — shiso is the Japanese name for Perilla frutescens var. crispa. However, "perilla" in Korean cooking (kkaennip) refers to a slightly different variety with larger, less serrated leaves and a stronger sesame-like flavor. Japanese shiso and Korean perilla are closely related but not identical in taste. When buying outside Japan, look specifically for "Japanese shiso" or "ao-shiso" seeds rather than generic "perilla" to get the authentic flavor.

Where can I buy fresh shiso in Japan?▼

Fresh green shiso (sold as "ōba") is available in virtually every Japanese supermarket year-round — look in the herb and garnish section near the vegetables. It typically comes in packets of 10–20 leaves for ¥100–¥150. Convenience stores (7-Eleven, Lawson, FamilyMart) sell it in smaller quantities. Specialty food halls in department stores carry premium varieties including the decorative chirimen-jiso.

Can I eat shiso raw?▼

Absolutely — green shiso is frequently eaten raw as a garnish, salad ingredient, or wrap for meat and fish. The raw leaf has the most vibrant flavor. It is also used raw in Japanese-style pasta dishes, chopped into dressings, and torn over cold tofu. Red shiso is generally processed (pickled or dried) rather than eaten raw due to its more bitter taste and tougher texture.

What is the difference between shiso and basil?▼

Shiso and basil are both in the mint family (Lamiaceae) and share some aromatic qualities, which is why they are sometimes substituted for each other in fusion cooking. However, shiso has a more complex flavor — the minty and anise notes are more prominent in shiso, while sweet basil is more floral and clove-like. Shiso leaves are also thinner, more serrated, and less glossy than basil. In Japanese cooking, shiso cannot be replaced by basil without significantly changing the dish's character.

Find Your Tokyo Food Base

Tokyo offers the deepest access to Japan's culinary heritage — from Tsukiji outer market mornings to Ginza sushi counters where shiso-garnished omakase awaits.

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