Japan (nationwide; Kamo nasu — Kamogawa district, Kyoto; diverse regional varieties throughout the country)
Nasu (茄子, Japanese eggplant — Solanum melongena and related cultivars) in Japan encompasses a remarkable diversity of varieties distinct from the large, globe-shaped Italian eggplant dominant in Western markets — from the long, slender Japanese-type to the small, round Kyoto Kamo nasu (加茂茄子), the small striped Mame nasu (bean eggplant), the very large Echizen nasu, and the white Shiro nasu. Each variety has different moisture content, seed density, flesh texture, and appropriate cooking methods. Kamo nasu — the large, round Kyoto type with a dense, meaty flesh and minimal seeds — is the prestigious form used for dengaku (skewered, split in half, miso-glazed and grilled) and miso nikomi stews. Japanese slender eggplant (naga nasu) is ideally suited to stir-frying in miso (nasu no miso itame), quick-pickling (asazuke), and nabe. All Japanese eggplant benefits from scoring or piercing before preparation to prevent skin from bursting; salting (1% weight, 15 minutes) draws excess moisture and bitterness while preserving colour. Oil is essential for eggplant — the flesh is highly porous and must be pre-coated in oil before frying to prevent it from absorbing too much cooking oil. Pan-fried nasu with ponzu and grated ginger (agehitashi) is one of Japan's simplest and most satisfying summer preparations.
Mild, absorptive flesh takes on surrounding flavours deeply; smoky dengaku miso; rich oil in agehitashi; sesame-miso depth in stir-fry; one of Japan's most flavour-versatile vegetables
{"Variety selection: Kamo nasu for dengaku and stewing; slender naga nasu for stir-fry and quick pickle","Salt-and-rest (1% by weight, 15 minutes): draws moisture and bitterness; improves colour retention during cooking","Pre-coat with oil before frying — prevents excessive oil absorption into the highly porous flesh","Score or pierce before grilling/roasting — prevents skin explosion from internal steam pressure","Agehitashi: fry in oil until golden, dress hot with dashi-soy mixture while still warm — quick absorption"}
{"Dengaku: halve Kamo nasu, score interior in crosshatch, brush with sesame oil, grill cut-side down first, then flip and apply miso dengaku glaze","Agehitashi: fry slender nasu in 2cm oil at 180°C until golden all over; immediately transfer to dashi-soy bowl while hot","Nasu no miso itame: slice Japanese eggplant; fry in sesame oil with garlic and ginger; finish with white miso, mirin, sake","For beautiful purple colour preservation: splash a few drops of rice vinegar into the blanching water"}
{"Not salting Japanese eggplant before preparation — bitterness and excess moisture affects texture in cooked dishes","Frying without pre-oiling — eggplant absorbs oil from the pan like a sponge; external coating needed first","Using globe eggplant where Japanese varieties are specified — completely different moisture and texture","Over-cooking until mushy — Japanese eggplant should retain structural integrity with yielding interior"}
Japanese Farm Food — Nancy Singleton Hachisu; Japanese Cooking: A Simple Art — Shizuo Tsuji