Shiso

This article is about a culinary variety of perilla. For the other variety, see Perilla frutescens. For the city in Japan, see Shisō, Hyōgo.

Perilla frutescens var. crispa, also known by its Japanese name shiso, is a cultigen of Perilla frutescens, a herb in the mint family Lamiaceae. It is native to the mountainous regions of China and India, but is now found worldwide. The plant occurs in several forms, as defined by the characteristics of their leaves, including red, green, bicolor, and ruffled. Shiso is perennial and may be cultivated as an annual in temperate climates. Different parts of the plant are used in East Asian and Southeast Asian cuisine.

Shiso
Red shiso
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Lamiales
Family:	Lamiaceae
Genus:	Perilla
Species:	P. frutescens
Variety:	P. f. var. crispa
Trinomial name
Perilla frutescens var. crispa (Thunb.) H.Deane
Synonyms^[1]
Dentidia nankinensis Lour. Dentidia purpurascens Pers. Dentidia purpurea Poir. Ocimum acutum Thunb. Ocimum crispum Thunb. Perilla acuta (Thunb.) Nakai Perilla arguta Benth. Perilla crispa (Thunb.) Tanaka Perilla frutescens var. acuta (Thunb.) Kudô Perilla frutescens var. arguta (Benth.) Hand.-Mazz. Perilla frutescens f. crispa (Thunb.) Makino Perilla frutescens var. crispa (Benth.) Deane ex Bailey Perilla frutescens var. nankinensis (Lour.) Britton Perilla nankinensis (Lour.) Decne. Perilla ocymoides var. crispa (Thunb.) Benth.

Names

The herb is known in Chinese as zǐsū (紫蘇 "purple perilla"), which is the origin of the Japanese name shiso (紫蘇/シソ) and the Vietnamese name tía tô.^[2] It is also called huíhuísū (回回蘇 "Muslim perilla") in Chinese. In Korean, it is known as soyeop (소엽). In ancient Japan, it was called inue ("pseudo-perilla"), though this name is no longer used.

In English, it is sometimes called the "beefsteak plant", because purple-leaf varieties resemble the blood-red color of meat.^[3] Other common names include "perilla mint",^[4] "Chinese basil",^[5][6] and "wild basil".^[7] The alias "wild coleus" or "summer coleus" probably describe ornamental varieties.^[7][8] Red-leaf varieties are sometimes called "purple mint".^[4] In the Ozarks, it is called "rattlesnake weed", because the sound the dried stalks make when disturbed along a footpath is similar to a rattlesnake's rattle.^[9] The Japanese name shiso became part of the English lexicon in the 1990s, owing to the growing popularity of sushi.^[10]

The plant is sometimes referred to by its genus name, Perilla, but this is ambiguous as perilla could also refer to a different cultigen (Perilla frutescens var. frutescens). To avoid confusion, Perilla frutescens var. frutescens is called egoma ("perilla sesame") in Japan and deulkkae ("wild sesame") in Korea.^[11][12]

When red-leaf shiso was introduced into the West in the 1850s, it was given the scientific name Perilla nankinensis, after the city of Nanking.^[13] This name is now less common than Perilla frutescens.

Origins and distribution

It is suggested that the native origins of the plant are mountainous regions of India and China,^[14] although other sources point to Southeast Asia.^[15]

History

Perilla frutescens was cultivated in ancient China.^[16] One of the early mentions comes from the Supplementary Records of Renowned Physicians (名醫別錄 Míng Yī Bié Lù), written around 500 AD,^[17] where it is listed as su (蘇), and some of its uses are described. The plant was introduced into Japan around the eighth to ninth centuries.^[18]

Red shiso became available to gardening enthusiasts in England around 1855.^[13] By 1862, the English were reporting overuse of this plant, and proposing Coleus vershaeffeltii^[19] or Amaranthus melancholicus var. ruber made available by J.G. Veitch as an alternative.^[20] It was introduced later in the United States, perhaps in the 1860s.^[21][22] Today, it is considered a weed or invasive species.

Description

Shiso grows to 40–100 centimetres (16–39 in) tall.^[23] It has broad ovate leaves with pointy ends and serrated margins, arranged oppositely with long leafstalks. Shiso seeds are about 1mm in size, and are smaller and harder compared to other perilla varieties.^[24][25] Seeds weigh about 1.5 g per 1000 seeds.^[26] The plants are not frost hardy. In USDA zones 11 and above, they grow as perennials.^[27]

Varieties

Several forms of shiso exist.^[28] They are defined by the color and morphology of the leaves, though coloring is also found on the stalk and flower buds. Redness in shiso is caused by shisonin, an anthocyanin pigment found in perilla.^[29] Ruffled red shiso was the first form examined by Western botanists, and Carl Peter Thunberg named it P. crispa (meaning "wavy" or "curly"). That Latin name crispa was later retained when shiso was reclassified as a cultigen.

Red shiso (f. purpurea)

Leaves red on both sides, flat surface. Often called simply "shiso".

Ruffled red shiso (f. crispa)

Leaves red on both sides, ruffled surface.

Green shiso (f. viridis)

Leaves green on both sides, flat surface.

Ruffled green shiso (f. viridi-crispa)

Leaves green on both sides, ruffled surface. Cultivar.

Bicolor shiso (f. discolor)

Leaves green on top side, red on back side, flat surface. Cultivar.

Variegated shiso (f. rosea)

Leaves a mix of green and red on both sides, flat surface.

•  

  Red shiso growing in the wild

•  

  Red shiso field in Fukui City, Japan

•  

  Red shiso in Saint-Girons, France

•  

  Green shiso in Beijing, China

•  

  Green shiso flower

•  

  Green shiso flower

•  

  Green shiso as a potted plant

•  

  Bicolor shiso in the Royal Botanic Garden, Sydney, Australia

•  

  Shiso seed pods

Culinary use

Cultivated shiso is eaten in many East Asian and Southeast Asian countries. Wild, weedy shiso are not suitable for eating, as they do not have the characteristic shiso fragrance, and are high in perilla ketone, which is potentially toxic.^{[citation needed]}

East Asia

Japan

Japanese names for shiso types

Red shiso (f. purpurea)	Shiso (紫蘇)
	Akajiso (赤紫蘇)
Ruffled red shiso (f. crispa)	Chirimen-jiso (縮緬紫蘇)
Green shiso (f. viridis)	Aojiso (青紫蘇)
	Ōba (大葉)
Ruffled green shiso (f. viridi-crispa)	Chirimen-aojiso (縮緬青紫蘇)
Bicolor shiso (f. discolor)	Katamen-jiso (片面紫蘇)
Variegated shiso (f. rosea)	Madara-jiso (斑紫蘇)

Shiso (紫蘇) is extensively used in Japanese cuisine. Red, green, and bicolor varieties are used for different purposes.

Red shiso is called akajiso (赤紫蘇). It is used in the making of umeboshi (pickled plums) to give the plums a red color. The leaves turns bright red when steeped in umezu, the vinegary brine that results as a byproduct of pickling plums.^[30][31] It can also be combined with umezu to make certain types of sushi. In the summer, it is used to make a sweet, red juice. In Kyoto, red shiso and its seeds are used to make shibazuke, a type of fermented eggplant.^[32]

Red leaves are dried and pulverized into flakes, then mixed with salt to make a seasoning called yukari.^[33] The word yukari is an ancient term for the color purple, and was first used by Mishima Foods Co. to describe their shiso product, though the word is now used to refer to shiso salt in general.^[34][35] Red shiso leaf flakes are a common ingredient in furikake seasonings, meant to be sprinkled over rice or mixed into onigiri (rice balls).

Green shiso is called aojiso (青紫蘇) or ōba (大葉 "big leaf"). It is used to garnish noodle dishes like hiyamugi or sōmen, meat dishes like sashimi, tataki and namerō, and tofu dishes like hiyayakko. Whitebait (shirasu) sashimi is often garnished with green shiso. Whole leaves are also used as receptacles to hold wasabi, or tsuma (garnishes). Leaves can also be battered on one side and fried to make tempura, and are served with other fried items.^[36] Chopped leaves are used to flavor any number of fillings or batter to be cooked, for use in warm dishes. In Japan, pasta is sometimes topped with dried or freshly chopped shiso leaves, which is often combined with raw tarako (pollock roe).^[37] Originally, green shiso was used in place of basil, and has even been used in pizza toppings. In the summer of 2009, Pepsi Japan released a seasonal flavored beverage, the green colored Pepsi Shiso.^[38]

Shiso seed pods (fruits) are called shiso no mi, and are salted and preserved like a spice. They can be combined with fine slivers of daikon (radish) to make a simple salad.^[39] Oil pressed from the seeds was once used for deep-frying.^[30]

Shiso sprouts, buds and cotyledons are all called mejiso (芽紫蘇), and used as garnish. Red sprouts are called murame, and green sprouts are called aome.^[40] Although not often served in restaurants, mejiso are used as microgreens.

Shiso flowers are called hojiso (穂紫蘇), and used as garnish for sashimi. They are intended to be scraped off the stalk with chopsticks, and added as flavoring to the soy sauce dip. The flowers can also be pickled.

•  

  Various types of sushi with green shiso leaves

•  

  Ikura-don with green shiso garnish

•  

  Shrimp and whitebait sashimi with green shiso leaves

•  

  Shimesaba (cured mackerel) and whitebait sashimi with green shiso leaves

•  

  Green shiso leaf used to hold sashimi

•  

  Umeboshi pickled with red shiso

•  

  Red shiso salt (yukari) on rice

Korea

In Korea, shiso is called soyeop (소엽) or chajogi (차조기). It is less popular than the related cultigen, P. frutescens (deulkkae). Soyeop is commonly seen as a wild plant, and the leaves are occasionally used as a ssam vegetable.^[41] Red leaves are sometimes pickled in soy sauce or soybean paste as a jangajji, or deep-fried as bugak with a thin coat of rice-flour batter.^[41]

•  

  Yukhoe (raw steak) with green shiso leaf

China

Chinese cuisine also utilizes shiso, named zi su (紫苏), bai su (白苏), or huihui su (回回苏) in Chinese. It is sometimes used as a decorative ingredient, and is sometimes eaten to reduce grease (as with barbecue). It is common practice to accompany fish and crab dishes with zisu, as it is believed that zisu leaves can offset the toxins in seafood.^[42]

Southeast Asia

Laos

In Laos, red shiso leaves are called pak maengda (ຜັກແມງດາ). They are used to add fragrance to khao poon (ເຂົ້າປຸ້ນ), a rice vermicelli dish that is similar to the Vietnamese bún.

Vietnam

In Vietnam, shiso is called tía tô.^[43] Compared to Japanese shiso, it has slightly smaller leaves but a much stronger aromatic flavor. Vietnamese tía tô are often bicolored, with leaves that are red on the backside.

Tía tô leaves are used in Vietnamese cuisine for salads, soups, or stir-fried dishes. The strong flavors are perfect for cooking seafoods such as shrimp and fish dishes. They are eaten as a garnish with bún (rice vermicelli). Leaves are also pickled.

Biochemistry

Shiso's distinctive flavor comes from perillaldehyde, which is found only in low concentrations in other perilla varieties, including Perilla frutescens.^[44][45] The oxime of perillaldehyde, perillartine, is about 2,000 times sweeter than sucrose.^[46] However, perillartine has a bitter aftertaste and is not soluble in water, and is only used in Japan as an artificial sweetener to sweeten tobacco.^[47]

Wild shiso is rich in perilla ketone, which is a potent lung toxin to some livestock.^[48] When consumed by cattle and horses, it causes pulmonary edema, leading to a condition sometimes called perilla mint toxicosis. Effects on humans remain to be studied.^[48]

The plant produces the natural product perilloxin, which is built around a 3-benzoxepin moiety. Like aspirin, perilloxin inhibits the enzyme cyclooxygenase with an IC₅₀ of 23.2 μM.^[49]

Other chemotypes include eschscholzia ketone, perillene, and the phenylpropanoids myristicin, dillapiole, elemicin, citral, and a type rich in rosefuran.^{[citation needed]}

Shiso contains only about 25.2–25.7% lipid,^[50] but still contains a comparable 60% ratio of ALA.^[51][52] Aromatic essential oils present are limonene,^[45] caryophyllene,^[45] and farnesene.^{[citation needed]}

Bactericidal and preservative effects of shiso, due to the presence of terpenes such as perilla alcohol, have been noted.^[36]

Cultivation

 

Green shiso leaves (ōba) being sold at a market in Ibaraki, Japan

 

Green shiso leaves (ōba)

In temperate climates, the plant is self-sowing, but the seeds are not viable after long storage, and germination rates are low after a year.

Japan

The bar graph shows the trend in total production of shiso in Japan, as given by the Ministry of Agriculture, Forestry and Fisheries^[53][54]

The biggest producer of shiso for the food market is Aichi Prefecture, boasting 3,852 tons, or 37.0% of national production (2008 data).^[55] Data for greenhouse production, which is a better indicator of crop yield, gives 3,528 tons for Aichi Prefecture, or 56% share of national production.^[53][56] The difference in percentage is an indicator that in Aichi, the leaves are 90% greenhouse produced, whereas nationwide the ratio is 60:40 in favor of indoors over open fields.^[57] In Aichi Prefecture, the city of Toyohashi produces the most shiso in Japan.^[58][59] They are followed in ranking by Namegata, Ibaraki.

There seems to be a growth spurt for shiso crops grown for industrial use. The data shows the following trend for crops targeted for oil and perfumery.^[60]

History

Green shiso was not industrially grown until the 1960s.^[61] Production volume remained negligible until 1976. Several accounts exist regarding the beginnings of shiso production.

According to one anecdote, in 1961, a food co-operative from Shizuoka specializing in tsuma (garnishes) began shipping green shiso to the Osaka market, where it grew so popular the name ōba (大葉 "big leaf") became the trade name for bunches of picked green leaves.^[62]

Another account places the start of green shiso production origin in the city of Toyohashi, the foremost ōba producer in the country.^[58] It claims that the Toyohashi Greenhouse Horticultural Agricultural Cooperative^[a] experimented with planting green shiso around 1955, and started merchandising the leaves as ōba around 1962. In 1963 they organized "cooperative sorting and sales" of the crop, and achieved year-round production around 1970.^[53]

In the 1970s refrigerated storage and transport became available, bringing fresh produce and seafood to areas away from farms or seaports.^[53] Foods like sashimi became daily fare, and so too did sashimi garnishes like green shiso.

The word ōba was originally a trade name and was not listed in the popular dictionary Shin Meikai Kokugo Jiten as "green shiso" until its 5th edition (1997).^[63]

See also

 

Wikimedia Commons has media related to Perilla frutescens var. crispa.

 

Wikispecies has information related to Perilla frutescens var. crispa.

• Tantakatan

References

1. "Perilla frutescens var. crispa (Thunb.) H.Deane". World Flora Online. World Flora Consortium. 2022. Retrieved 17 December 2022.
2. Hu (2005), p. 651.
3. Tucker & DeBaggio (2009), p. 389, "name beefsteak plant.. from the bloody purple-red color.."
4. Wilson et al. (1977) apud Yu, Kosuna & Haga (1997), p. 1
5. Kays, S. J. (2011). Cultivated Vegetables of the World:: A Multilingual Onomasticon. Wageningen: Wageningen Academic Publishers. pp. 180–181, 677–678. ISBN 9789086861644.
6. Yu, Kosuna & Haga (1997), p. 3.
7. Vaughan, John; Geissler, Catherine, eds. (2009). The New Oxford Book of Food Plants (2nd ed.). Oxford: Oxford University Press. p. 340. ISBN 9780199549467.
8. Duke (1988) apud Yu, Kosuna & Haga (1997), p. 1
9. Foster & Yue (1992), pp. 306–308.
10. Burum, Linda (1992). A Guide to Ethnic Food in Los Angeles. HarperPerennial. p. 70. ISBN 9780062730381.
11. Hosking, Richard (2015). "egoma, shiso". A Dictionary of Japanese Food: Ingredients & Culture. Tuttle Publishing. pp. 37, 127. ISBN 9781462903436.
12. Hall, Clifford, III; Fitzpatrick, Kelley C.; Kamal-Eldin, Afaf (2015-08-25), "Flax, Perilla, and Camelina Seed Oils: α-Linolenic Acid-rich Oils", Gourmet and Health-Promoting Specialty Oils, p. 152, ISBN 9780128043516{{citation}}: CS1 maint: multiple names: authors list (link)
13. anonymous (March 1855), "List of Select and New Florists' Flowers" (google), The Floricultural Cabinet, and Florists' Magazine, London: Simpkin,Marshall, & Co., 23: 62 "Perilla Nankinesnsis, a new and curious plant with crimon leaves.."; An earlier issue (Vol. 21, Oct. 1853, p.240) describes it being grown among the "New Annuals in the Horticultural Society's Garden".
14. Roecklein, John C.; Leung, PingSun, eds. (1987). A Profile of Economic Plants. New Brunswick, U.S.A: Transaction Publishers. p. 349. ISBN 9780887381676.
15. Blaschek, Wolfgang; Hänsel, Rudolf; Keller, Konstantin; Reichling, Jürgen; Rimpler, Horst; Schneider, Georg, eds. (1998). Hagers Handbuch der Pharmazeutischen Praxis (in German) (3 ed.). Berlin: Gabler Wissenschaftsverlage. pp. 328–. ISBN 9783540616191.
16. Sanderson, Helen; Renfrew, Jane M. (2005). Prance, Ghillean; Nesbitt, Mark (eds.). The Cultural History of Plants. Routledge. p. 109. ISBN 0415927463.
17. Yu, Kosuna & Haga (1997), p. 37.
18. Yu, Kosuna & Haga (1997), p. 3, citing:Tanaka, K. (1993), "Effects of Periilla", My Health (8): 152–153 (in Japanese).
19. Dombrain, H. H. (1862), Floral Magazine (google), vol. 2, London: Lovell Reeve, Pl. 96
20. Dombrain, H. H. (1862), "New or rare plants" (google), The Gardener's Monthly and Horticultural Advertiser, London: Lovell Reeve, 4: 181
21. Maloy, Bridget (1867), "The Horticultural Department:The Culture of Flowers" (google), The Cultivator & Country Gentleman, Alban, NY: Luther Tucker & Son, 29: 222, "Perilla nankinensis was one of the first of the many ormanental foliaged plants brought into the gardens and greenhouses of this country within few years. "
22. Foster & Yue (1992), pp. 306–8 gives mid-19th century as introductory period into the US.
23. Nitta, Lee & Ohnishi (2003), pp. 245-
24. Heibonsha (1969) Encycl. states egoma seeds are about 1.2 mm, slightly larger than shiso seeds. However, egoma seeds being grown currently can be much larger.
25. Oikawa & Toyama (2008), p. 5, egoma, sometimes classed P. frutescens var. Japonica, exhibited sizes of sieve caliber between 1.4 mm ~ 2.0 mm for black seeds and sieve caliber between 1.6 mm ~ 2.0 mm for white seeds.
26. This is based on 650 seeds/gram reported by a purveyor Nicky's seeds; this is in ballpark with "The ABCs of Seed Importation into Canada". Canadian Food Inspection Agency. Retrieved 2012-03-31. also quotes 635 per gram, though it is made unclear which variety
27. "Shiso".
28. BG Plants 和名−学名インデックス（YList）
29. Yu, Kosuna & Haga (1997), p. 151: "Kondo (1931) and Kuroda and Wada (1935) isolated an anthocyanin pigment from purple Perilla leaves and gave it the name shisonin".
30. Yu, Kosuna & Haga (1997), pp. 1–2, 10–11
31. Shimbo (2001), pp. 142-
32. Ogawa, Toshio (1978). Tsukemono (preview). Hoiku-sha (保育社). p. 115. ISBN 978-4-586-50423-7.
33. Andoh & Beisch (2005), pp. 12, 26–7
34. Used as such by Japanese-American author, Andoh & Beisch (2005), pp. 26–7
35. . Mishima foods webpage. Archived from the original on 2012-05-15.
36. Mouritsen (2009), pp. 110–112
37. Rutledge, Bruce (2004). Kūhaku & Other Accounts from Japan (preface). pp. 218–9. ISBN 978-0-974199-50-4. gives this tarako and shiso spaghetti recipe
38. . Archived from the original on 2010-05-10. Retrieved 2010-05-10.
39. Larkcom (2007)
40. Ishikawa (1997), p. 108. Photograph shows both green shiso sprouts (aome) and slightly larger red shiso sprouts (mura me) with true leaves
41. 이, 영득 (2010). San-namul deul-namul dae baekgwa 산나물 들나물 대백과 (in Korean). 황소걸음. ISBN 978-89-89370-68-0 – via Naver.
42. "紫苏香浓，一物三药". szyyj.gd.gov.cn. Retrieved 2023-04-13.
43. Nitta, Miyuki; Lee, Ju Kyong; Ohnishi, Ohmi (April 2003). "Asian Perilla crops and their weedy forms: Their cultivation, utilization and genetic relationships". Economic Botany. 57 (2): 245–253. doi:10.1663/0013-0001(2003)057[0245:APCATW]2.0.CO;2. S2CID 30209741.
44. Tucker & DeBaggio (2009), p. 389.
45. Ito, Michiho (2008). "Studies on Perilla Relating to Its Essential Oil and Taxonomy". In Matsumoto, Takumi (ed.). Phytochemistry Research Progress. New York: Nova Biomedical Books. pp. 13–30. ISBN 9781604562323.
46. O'Brien-Nabors (2011), p. 235.
47. Kinghorn and Compadre (2001) apud O'Brien-Nabors (2011), p. 235.
48. Tucker & DeBaggio (2009), p. 389
49. Liu, J.-H.; Steigel, A.; Reininger, E.; Bauer, R. (2000). "Two new prenylated 3-benzoxepin derivatives as cyclooxygenase inhibitors from Perilla frutescens var. acuta". J. Nat. Prod. 63 (3): 403–405. doi:10.1021/np990362o. PMID 10757731.
50. Hyo-Sun Shin, in Yu, Kosuna & Haga (1997), pp. 93-, citing Tsuyuki et al. (1978)
51. Esaki, Osamu (2006). "Seikatsu shūkan yobō no tame no shokuji/undō ryōhō no sayōkijo ni kansuru kenkyū" 生活習慣病予防のための食事・運動療法の作用機序に関する研究. Proceedings of the JSNFS. 59 (5): 326.gives 58%
52. Hiroi (2009), p. 35 harvp error: no target: CITEREFHiroi2009 (help),^{[clarification needed]} gives 62.3% red, 65.4% green shiso
53. Okashin (2012) website pdf, p.174
54. MAFFstat (2012b), FY2009, title: "Vegetables: Domestic Production Breakdown (野菜の国内生産量の内訳)" , Excel button (h001-21-071.xls) For green shiso, cumulative figures for shiso as vegetable is used.)
55. Aichi Prefecture (2011). "愛知の特産物（平成21年）". Retrieved 2012-04-02., starred data is FY2008 data.
56. Both these numbers square with MAFFstat (2012a) figures
57. MAFFstat (2012a)
58. . 2012. Archived from the original on 2011-01-27. Retrieved 2012-04-02., under heading "Tsumamono nippon-ichi"(つまもの生産日本一) states Toyhashi is Japan's No. 1 producer of both edible chrysanthemums and shiso
59. This can be derived from MAFFstat (2012a), with minimal data analysis. Aichi produces four times as much as the 2nd ranked Ibaraki Prefecture and Toyohashi grew 48% of it, so about double any other prefectural total.
60. MAFFstat (2012c)
61. Shimbo (2001), p. 58.
62. Kawakami, Kōzō [in Japanese]; Nishimura, Motozaburō [in Japanese] (1990). Nihon ryōri yurai jiten 日本料理由来事典. Vol. 1. Dōhōsha. ISBN 978-4-8104-9116-6., quoted by "Kotoba no hanashi 1249: Ōba to shiso" ことばの話1249「大葉と紫蘇」. Toshihiko Michiura's Heisei kotoba jijo. 2003-06-26. Retrieved 2012-04-02.: "..一九六一（昭和三十六）年ごろ、静岡県の、あるツマ物生産組合が、青大葉ジソの葉を摘んでオオバの名で大阪の市場に出荷.."
63. Kindaichi 1997.

Notes

1. Toyohashi Engei Nōkyō (豊橋園芸農協).

Works cited

(Herb books)

• Larkcom, Joy (2007). Oriental Vegetables (preview). Frances Lincoln. pp. 112–. ISBN 978-0-7112-2612-8.

(Cookbooks)

• Andoh, Elizabeth; Beisch, Leigh (2005), Washoku: recipes from the Japanese home kitchen (google), Random House Digital, Inc., p. 47, ISBN 978-1-58008-519-9
• Mouritsen, Ole G. (2009). Sushi: Food for the Eye, the Body and the Soul. Jonas Drotner Mouritsen. Springer. pp. 110–112. ISBN 978-1-4419-0617-5.
• Shimbo, Hiroko (2001), The Japanese kitchen: 250 recipes in a traditional spirit (preview), Harvard Common Press, ISBN 978-1-55832-177-9
• Tsuji, Shizuo; Fisher, M.F.K. (2007), Japanese Cooking: A Simple Art (preview), Kodansha International, p. 89, ISBN 978-4-7700-3049-8
• Ishikawa, Takayuki (1997). Ninki no nihon ryōri: ichiryū itamae ga tehodoki suru 人気の日本料理―一流板前が手ほどきする [Chef's Best Choice Japanese Cuisine]. Bessatsu Kateigaho mook. Sekaibunkasha. ISBN 978-4-418-97143-5.

(Nutrition and chemistry)

• O'Brien-Nabors, Lyn (2011), Alternative Sweeteners (preview), CRC Press, p. 235, ISBN 978-1-4398-4614-8
• Yu, He-Ci; Kosuna, Kenichi; Haga, Megumi (1997), Perilla: the genus Perilla, Medicinal and aromatic plants--industrial profiles, vol. 2, CRC Press, ISBN 978-90-5702-171-8, pp. 26–7

(Japanese dictionaries)

• Shinmura, Izuru (1976). Kōjien 広辞苑. Iwanami.
• Satake, Yoshisuke [in Japanese]; Nishi, Sadao; Motoyama, Tekishū [in Japanese] (1969) [1968]. "Shiso" しそ. Sekai hyakka jiten. Vol. 10. Heibonsha. pp. 246–7. (in Japanese)
• Kindaichi, Kyōsuke (1997), Shin Meikai Kokugo Jiten 新明解国語辞典 (5th ed.), Sanseido, ISBN 978-4-385-13099-6

(Japanese misc. sites)

• Okashin. . Archived from the original on 2007-08-12. Retrieved 2012-04-02.: right navbar "9 農業(野菜)"

(Ministry statistics)

• MAFFstat (2012a). "地域特産野菜生産状況調査(regional specialty vegetables production status study)". Retrieved 2012-04-02.. It gives to ink to H12 (FY2000), H14 (FY2002), H16 (FY2004), H18 (FY2006), H20 (FY2008) figures. They are not direct links to Excel sheets, but jump to TOC pages at e-stat.go.jp site. The latest available is TOC for The FY2008(年次) Regional Specialty Vegetable Production Status Study, published 11/26/2010. Under Category 3-1 Vegetables by crop and prefecture: acreage, harvest yield, etc. (野菜の品目別、都道府県別生産状況 作物面積収穫量等), find 10th crop shiso (しそ), and click Excel button to open p008-20-014.xls. Under Category 3–2, you can also retrieve Vegetable by crop and prefecture: major cutivars at major-producing municipalities (野菜の品目別、都道府県別生産状況 主要品種主要市町村 ).
• MAFFstat (2012b). "食料需給表 (food supply & demand tables)". Retrieved 2012-04-02.. for data (h001-21-071.xls).
• MAFFstat (2012c). "特産農作物の生産実績調査(specialty vegetables production realized study)". Retrieved 2012-04-02.. Links to H14 (FY2000) - H19 (FY2007) biannual figures, not direct link to Excel but jump to TOC pages at e-stat.go.jp site. The latest available is TOC for The FY2007(年次) Specialty Vegetable Production Realized Study, published 3/23/2010. Locate 1-1-10 is Shiso (しそ), where heading reads " Industrial crop sown acreage and production" (工芸作物の作付面積及び生産量, and click Excel button to open p003-19-010.xls.
• Tucker, Arthur O.; DeBaggio, Thomas (2009), The Encyclopedia of Herbs: a comprehensive reference to herbs of flavor and (preview), Timber Press, p. 389, ISBN 978-0-88192-994-2
• Channell, BJ; Garst, JE; Linnabary, RD; Channell, RB (5 August 1977), "Perilla ketone: a potent lung toxin from the mint plant, Perilla frutescens Britton", Science, 197 (4303): 573–574, Bibcode:1977Sci...197..573W, doi:10.1126/science.877573, PMID 877573
• Foster, Steven; Yue, Chongxi (1992), Herbal emissaries: bringing Chinese herbs to the West : a guide to gardening, Inner Traditions / Bear & Co., pp. 306–8, ISBN 9780892813490
• Hu, Shiu-ying (2005), Food plants of China, vol. 1, Chinese University Press, ISBN 9789629962296
• Oikawa, Kazushi; Toyama, Ryo (2008), "Analysis of Nutrition and the Functionality Elements in Perilla Seeds", 岩手県工業センター研究報告, 15 pdf (in Japanese except abstract)
• Imamura, Keiji (1996), Prehistoric Japan - New Perspectives on Insular East Asia, Honolulu: University of Hawaii Press, pp. 107–8, ISBN 9780824818524
• Habu, Junko (2004), Ancient Jomon of Japan, Cambridge and New York: Cambridge Press, p. 59, ISBN 9780521776707