Aonisai, Tokyo

Why you should experience Aonisai in Tokyo, Japan.

Aonisai is an inventive izakaya where Nakano's independent dining culture, chef-owner Junpei Aoki's fermentation-focused cooking, natural wine and Japanese sake converge around food built from koji, seasonal produce and carefully handled seafood.

Set along a residential street near Nakano-dori and just steps from Araiyakushi Baishoin Temple, the compact restaurant places Aoki's counter at the center of a menu that crosses izakaya cooking with techniques drawn from fermentation and contemporary wine-bar culture. Koji enters marinades and seasonings, vegetables receive pickling and fermentation treatments, and seafood moves through curing, grilling and raw preparations according to the ingredient. Sake and natural wine broaden those flavors through pairings that move freely between Japanese brewing and low-intervention European bottles. The result is a Nakano izakaya where Aoki uses fermentation, seasonal ingredients and an unusually broad drinks program to give familiar Japanese drinking culture a highly personal culinary direction.

What you should know about Aonisai.

Aonisai is best known for chef-owner Junpei Aoki's decision to build an independent izakaya around fermentation after a culinary career that crossed Japanese restaurant cooking, wine and the study of microorganisms behind flavor. Aoki developed his craft through professional kitchens before concentrating more deeply on koji, fermented seasonings and the relationship between food and alcohol, eventually making those processes central to his own restaurant. His cooking draws on hakkō, the Japanese tradition of microbial fermentation responsible for foundational ingredients including miso, soy sauce, sake and mirin, then pushes that principle into house preparations designed around individual vegetables, fish and meat. Koji became particularly important to Aoki as both a seasoning and a method for altering texture, sweetness and umami, giving fermentation a practical role throughout the meal without turning the restaurant into a narrowly traditional operation. Natural wine developed alongside that work as another product shaped through fermentation, allowing Aoki to connect Japanese koji culture with bottles selected from small-scale producers. Aonisai subsequently earned selection in Tabelog's Izakaya Tokyo Top 100, placing Aoki's compact Nakano operation among a nationally recognized group of Tokyo drinking restaurants. The achievement rests on a coherent body of work: Aoki treats fermentation as a working culinary technique linking his food, sake and wine across the complete restaurant.

Koji seasoning gives Aoki a foundation for changing both flavor and texture, drawing sweetness and umami from fermentation before heat or raw preparation establishes the final character of an ingredient. Seasonal fish moves naturally through that approach, with sashimi emphasizing clean flesh before cured or grilled preparations deepen salinity and concentration. Vegetables take another path through pickling and fermented seasoning, producing acidity and savory depth that make them substantial partners for sake and natural wine across a long sequence of small plates. Sake connects the food with Japan's own koji-dependent brewing tradition, then natural wine extends fermentation into bottles whose acidity and fruit open different routes through the same dishes. Aonisai makes fermentation the connective principle of the table, letting koji, pickling, brewing and winemaking shape successive flavors without reducing Aoki's cooking to a single technique.

How to fold Aonisai into your trip.

Aonisai works as the restaurant anchor for an afternoon moving through Nakano's Buddhist history, postwar popular culture and an extraordinary collection assembled by one of Japan's most consequential twentieth-century writers.

Begin at Araiyakushi Baishoin Temple, founded in 1586 and dedicated to Yakushi Nyorai, with a principal image combining the healing Buddha with Nyoirin Kannon. Devotion to the temple became closely associated with eye ailments, drawing generations of worshippers to a religious institution that helped shape the surrounding Arai district. Continue to Nakano Broadway, completed in 1966 before manga dealer Mandarake established its first tiny shop there in 1980 under founder Masuzo Furukawa. Expansion across the complex turned the building into a dense center for manga, animation, toys, watches and specialist collecting, linking Nakano with Japanese subculture on an international scale. Conclude at Nakano Sunplaza Archive, where the cultural history surrounding the former 1973 concert venue preserves another chapter of Nakano's postwar development through the performers and public events associated with the complex before its 2023 closure. The progression moves from Arai's centuries of Buddhist devotion through Nakano Broadway's transformation under Furukawa into the music culture surrounding Nakano Sunplaza, revealing the religious and popular-cultural layers around Aonisai.

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