Togetsu-kyō, Road bridge in Arashiyama, Kyoto, Japan

Togetsu-kyō is a road bridge over the Katsura River between Ukyō Ward's Sagano district and Nakanoshima Park. It is 155 meters long and 12.2 meters wide, with two paved vehicle lanes and stone-paved pedestrian walks raised by curbs on both sides. The deck rises one meter at its center in a gentle curve, and the wooden lattice railings recall the earlier timber bridges.

Buddhist monk Dosho constructed the original bridge in 836, which was relocated several times over the centuries. The current concrete structure dates from 1934, preserving the curved design of the old wooden bridges.

The name Togetsu comes from Emperor Kameyama, who in the mid-Kamakura period watched the moon move downstream to upstream over the bridge and remarked that it resembled 'the clear moon crossing.' The bridge was also called Horinji-bashi, as it served pilgrims visiting Horinji temple. A tradition holds that those who turn back before fully crossing the bridge after the Jusan-mairi visit at Horinji lose the wisdom they received.

The bridge connects to several transport lines, including Arashiyama Station, providing access to temples, parks, and shopping streets. Pedestrians use the stone paths on either side to take in views of the mountains and river.

The bridge had no lighting for most of its history. In 2005 the local Arashiyama Hoshokai association installed a small siphon-type hydroelectric generator where the Nishitakase River branches off upstream, and its power lights the walkways with LEDs at night. Surplus electricity is sold to Kansai Electric Power and the income funds local clean-up work.