The Ichinosaka River runs through the central part of Yamaguchi City, Yamaguchi Pref. It is a beautiful river, which the 24th generation of Ouch clan, Hiroyo Ouchi used to resemble the Kamo River in Kyoto. There still remains some old cityscape near the river and the vermillion Torii gate of Yasaka Shrine and the Five-story Pagoda of Rurikoji Temple can be seen beyond the roofs of the old houses. The repair works to prevent natural disasters like flooding had been given to river, but widening or deepening the river turned out impossible due to the preservation of the cityscape and the rows of cherry trees. Instead, Ichinosaka Dam was constructed to adjust the water volume. The tourists as well as the citizens enjoy the successive charms of the year including cherry blossoms blooming all together in spring and gleams of fireflies in summer. In autumn, the event of “artful Yamaguchi” is held, in which private houses are open to public and families exhibit their “treasures” at home. The whole town transforms to the museum during this period.