Nakagawa River Walk — Urban Waterway at Blue Hour

**Blue hour timing:** The Nakagawa blue hour walk begins at the Yanagibashi bridge (start here at sunset minus 20 min) and reaches Nakasu in 45 minutes, ending with the yatai lit against the dark water. The entire walk experiences only natural light transition — no signposting or design — and feels found rather than planned. **Art galleries:** Three galleries along the Yakuin section (roughly km 2–2.5) are open late (until 20:00 or 21:00) on Thursdays and Fridays — a secondary attraction alongside the walk.