The Verdict
OBANA has been grilling unagi — freshwater eel — over charcoal in the Mukojima district of Sumida since 1910, which places it among the oldest operational restaurants in Tokyo and the most deeply historically rooted unagi specialist in the city. The machiya townhouse, overlooking the Sumida River, provides a setting that the Meiji era's eel culture established as the proper context for this preparation: a traditional wooden building, the river visible from the dining rooms, the smell of eel fat caramelising on charcoal filling the space.
The unaju — eel over rice in a lacquer box — at Obana uses eel sourced from specific Hamamatsu and Mikawa freshwater sources whose quality the family has relied upon across five generations of operation. The kabayaki preparation — the eel split, steamed, then grilled with the restaurant's specific tare sauce applied multiple times over the charcoal — produces the specific balance of exterior caramelisation and interior moisture that represents the preparation's highest expression.
The Mukojima location — across the Sumida from Asakusa, accessible by water bus or by the Tobu Skytree Line — requires intention to reach and provides the experience of a Tokyo neighbourhood that the city's gentrification has not reached. Eating here involves the full weight of the neighbourhood's historical relationship with the river, the eel culture's specific place in Edo-period Tokyo's food history, and a townhouse that has served the same preparation since before the Great Kanto Earthquake of 1923.
Why It Works for a Birthday
The lacquer box of unaju at Obana — the eel glossy from the tare, the rice fragrant beneath it, served in a room that has been receiving birthday guests since 1910 — is the Tokyo birthday meal that communicates the deepest available historical connection between the occasion and the food. A century of birthdays celebrated with this specific preparation provides the context that no contemporary restaurant can manufacture.
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