National Route 155 is a national highway of Japan connecting Tokoname, Aichi and Yatomi, Aichi in Japan, with a total length of 126.9 km (78.9 mi).

It serves as Nagoya's outer loop.

Route 155 was originally designated on 18 May 1953 from Nagoya to Toyama.

This was redesignated as Route 41 in 1959.

This article relating to the roads and highways in Japan is a stub.