5 Days in Shikoku 2026: Naoshima, Iya Valley & Dogo Onsen Itinerary
A practical 5-day Shikoku itinerary covering Naoshima art island, Kotohira Shrine, Iya Valley vine bridge, Dogo Onsen, Matsuyama Castle and Kochi — with 2026 prices, transport notes, and the All Shikoku Rail Pass changes.