National Route 55 (国道55号, Kokudō Gojūgogō) is a national highway of Japan connecting the capitals of Tokushima and Kōchi prefectures, Tokushima and Kōchi in the island of Shikoku with a total length of 210.2 kilometers (130.6 mi).

National Route 55 spans much of the south side of Shikoku traveling southwest from Tokushima to Cape Muroto along the island's coast.

Most of the road runs parallel to the east branch of the Tosa Kaidō, a trade route established during the Yamato period.

The scenic view zone along the route is also a typhoon-prone area, and traffic restrictions are often imposed from summer to autumn due to roadside collapses, falling rocks, and high waves.

[2] Traffic restrictions may also be put in place when a major tsunami warning is issued.