Nankoku, Kochi

Planes descend over rice paddies on the approach to Kōchi Airport — the one named, uniquely in Japan, for Sakamoto Ryōma — and already the landscape signals something layered. Nankoku sits where the southern edge of the Shikoku mountains releases into the Kōchi plain, a geography that has made it a crossroads for as long as anyone has kept records. The Monobe and Kokubu rivers thread through the flatlands; the Funairi Canal, cut during the Edo period as part of reclamation works by Nōnaka Kenzan, still marks the grid of the agricultural south.

The soil here has grown rice since antiquity — Nankoku is considered the origin point of rice cultivation in Tosa — and that agricultural continuity shows in what the fields still produce: shiitake-green shishito peppers, new ginger, the square-sectioned bamboo shoot called shihōchiku, and the tomatoes sold under the name Tosa Mahoroba. At the えんこう祭 and the 土佐のまほろば祭り, that agricultural identity surfaces in public, briefly and without ceremony.

Up on Okō Mountain, the 高知県立歴史民俗資料館 stands on the site of Okō Castle, the Chōsokabe clan's hill fortress. Walk the 岡豊山歴史公園 and the earthworks are still legible underfoot. Further out, the temple ruins at Nōnaka and Hie — one with a Nara-period layout found nowhere else complete in Shikoku, the other preserving the largest pagoda foundation stone in Tosa — sit quietly in the plain, marked but not crowded, the past present in stone rather than performance.