The Nagawa Autumn-Colors Carnival brings about 500 shells to the Genrokubara grounds in Saiki's Nagawa valley, Oita, on October 18, 2026 — launches from 5:50 p.m., before the season's early dark. Roughly 2,000 neighbors make the mountain-district evening: free admission, food stalls, and parking organized by the city's Nagawa branch office. Small by every measure, and warmer for it.
Deep in the mountains behind Saiki, on Oita's southern coast, the Nagawa district holds its autumn carnival at the Genrokubara grounds — a playing field that, for one evening, becomes the valley's shared living room. The 2026 date is October 18; at 5:50 p.m. the first of roughly 500 shells rises, the early hour a nod to the season's early nightfall in the mountains. Around 2,000 people attend — essentially the district gathered, plus guests — and the format could not be simpler: free, no tickets, food stalls, and parking arranged by the city hall's Nagawa promotion office. Event details list through the Saiki tourism site (visit-saiki.jp). The 5:50 p.m. start is timed to the valley's early nightfall.
A mountain-valley carnival of 500 shells for 2,000 neighbors, free entry.