Japan’s castle towns — jokamachi — were built around feudal fortresses from the 15th century onward, organising merchants, craftsmen, temples and samurai residences in concentric zones radiating from the castle keep. Many survive today as living cities with intact historic districts, moats, stone walls and samurai neighbourhoods that can be explored on foot.
The Structure of a Castle Town
A classic jokamachi placed the castle on high ground or a strategic bend in a river. The innermost zone held the lord’s compound and senior retainers. The middle ring housed lower-ranking samurai, their residences identifiable by earthen walls and black-tiled gates. The outer zones held merchant streets, artisan workshops and temple rows (teramachi) deliberately placed as spiritual barriers and firebreaks at the town’s edge.
Water was central to castle defence. Moats — sometimes multiple rings of them — connected to rivers and controlled access routes. Many castle towns retain portions of these moat systems as scenic waterways threading through modern cities, planted with cherry trees that bloom spectacularly each spring.
Best Castle Towns for Walking
Kanazawa, Ishikawa: Often called “Little Kyoto,” Kanazawa escaped wartime bombing and retains intact samurai (buke-yashiki) and geisha (higashi chaya) districts within walking distance of Kanazawa Castle and Kenroku-en garden. The Nagamachi samurai district’s earthen walls, narrow lanes and preserved residences open to visitors make a complete half-day walk. The Higashi Chayagai and Kazuemachi Chayagai geisha districts add an evening dimension.
Matsue, Shimane: One of only twelve surviving original castle keeps in Japan, Matsue Castle overlooks a moat system still navigable by flat-bottomed horikawa sightseeing boats. The castle town’s samurai district stretches along the northern moat with preserved residences including the home of writer Lafcadio Hearn. Matsue’s position between Lake Shinji and the Japan Sea gives its light and landscape a distinctive quality.
Hagi, Yamaguchi: The castle town from which many Meiji Restoration leaders emerged is remarkably intact. White-walled samurai residences, preserved merchant lanes and former clan school buildings occupy a peninsula between two rivers. Walking routes connect the ruins of Hagi Castle with Shoin Shrine (honouring educator Yoshida Shoin) and the birthplaces of Ito Hirobumi and other Meiji figures.
Hirosaki, Aomori: Home to one of Japan’s most celebrated castle parks for cherry blossoms (approximately 2,600 trees, late April to early May), Hirosaki preserves outer moats, three surviving corner turrets and a relocated castle keep. The surrounding town retains merchant district architecture and is a gateway to Aomori apple orchards and the Shirakami Sanchi wilderness.
Kochi, Shikoku: Kochi Castle is one of only twelve original surviving keeps and uniquely preserves both the keep and the original attached palace (goten) — the only such pairing in Japan. The castle sits above the Sunday Hirome market district and the restored samurai residential lane of Kochi’s historic core.
Walking a Castle Town
Most castle town historic districts are compact enough to cover in 3–5 hours on foot. Maps are available at tourism information centres near train stations, often in English. Look for earthen walls (dobei), black-tiled rooflines, stone gutters and stepped garden walls as markers of the samurai zone. Temple districts at the town periphery hold dense concentrations of wooden gates and mossy stone lanterns. Many former merchant streets (kitamachi, shiromachi) retain traditional townhouse (machiya) facades adapted as cafes, craft shops and galleries.
Evening is worth extending: castle moats illuminated at night, lantern-lit geisha district lanes and local izakaya in historic buildings reveal castle towns at their most atmospheric.