Japan; Tokyo (Kanto) white negi and Kyoto Kujo negi as the two most recognized regional varieties
Japanese negi (Welsh onion, Allium fistulosum) is distinct from Western green onions in both its visual appearance and culinary role—longer, thicker-stalked, with a larger proportion of white stem relative to green top, and a more pungent flavor. Two primary regional styles reflect different culinary preferences: white negi (Tokyo negi, shiro-negi) from Kanto has very long, thick white stems with relatively little green, used in yakitori (negima), miso soup, and as a winter vegetable in nabe; Kujo negi from Kyoto is a thinner, all-green variety with softer texture and more delicate flavor, used fresh as a garnish, in hot dishes requiring quick wilting, and in Kyoto's characteristic nuta (miso-dressed leek and shellfish preparation). The white and green parts have different culinary applications: the white stem provides pungent sulfurous heat that mellows with heat; the green top provides fresh, mild onion flavor used raw. Slicing technique varies by application: negi no shiraganegi (silk-cut negi) produces extremely fine, long shreds used as delicate garnish for sashimi; naname-giri (diagonal cut) for hot dishes maximizing surface area; izutsu-giri (cylinder cut) for nabe where the negi holds its shape. Negi is indispensable in Japanese cooking—one of the most universal aromatics across all regional traditions.
White stem: pungent sulfurous heat mellowing to sweet with heat; green: mild fresh onion; Kujo: delicate and aromatic
{"White Tokyo negi and Kyoto Kujo negi represent regional preferences with distinct flavor profiles","White stem provides pungent sulfurous heat; green top provides mild fresh onion—different applications","Shiraganegi silk-cut: extremely fine julienne for sashimi garnish requiring precise knife skill","Diagonal naname-giri cut maximizes surface area for hot applications; cylinder cut holds shape in nabe","Blanching transforms pungent white negi to sweet, mellow, yielding—entirely different character"}
{"For shiraganegi: remove outer layer, cut into 5cm lengths, slice lengthwise into fine threads, soak in ice water","Kujo negi in cold water after cutting refreshes and crisps the green texture","Charred negi: char outer layers over flame, peel and serve; smoky-sweet transformation","Negi oil: blanch, puree, and steep in neutral oil for an aromatic green negi oil for dressings"}
{"Using only green parts and discarding white—the white stem's flavor intensity is valuable","Confusing negi with Western green onions—Japanese negi is thicker, more pungent, different applications","Not applying the correct cut for the application—shiraganegi for garnish; rough cuts for cooking","Adding to hot dishes too early where quick wilt is desired—negi overcooks rapidly"}
Shizuo Tsuji — Japanese Cooking: A Simple Art