Nihonbashi is where Edo did business, and four hundred years on it still does — the oldest department store in Japan, a seaweed shop trading since 1849, a paper merchant since 1653, and the bridge that every road in the country measures itself from. Two and a half kilometres, best in the morning when the old shops open and the towers haven't filled.
Start at the Mitsukoshi flagship, descended from a 1673 kimono shop, two bronze lions on its steps. Across to Coredo Muromachi, glass towers with an arcade of old trades at the foot — knives, dried fish, sake. Then the small survivors: Yamamoto Nori, selling nori on the same corner since 1849, where the sushi shops buy theirs.
The bridge is the heart of it. The 1911 stone arch carries the marker for kilometre zero — every national road begins here — and has carried the expressway on its shoulders since the 1960s. A plan to bury the road is finally moving; see it under concrete while you still can.
End at Ozu Washi, a paper house since 1653, and the Bank of Japan, Tatsuno Kingo's 1896 stone pile, before Nihombashi station.
