Ayu, small river trout sometimes known as sweetfish, were considered a specialty of Chikugo Province during the summer months. In this design, the Chikugo River flows through the foreground, separating Chikugo Province on the left from Chikuzen Province to the bottom right. The village of Haki appears within the trees of the far bank, as the mountains rise above the pink clouds of sunset. To the top left of the river, the weir (dam) catches the ayu as they swim with the current. Made of bamboo and wood, this type of fish trap allows water and smaller fish to pass through, while larger fish are captured and gathered by the fisherman. Today, the former Chikugo Province corresponds to southwestern Fukuoka Prefecture.