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|---|---|---|---|---|
| 国道420号 | ||||
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| Route information | ||||
| Length | 66.5 km[1] (41.3 mi) | |||
| Major junctions | ||||
| West end |  National Route 153 in Toyota, Aichi | |||
| East end |   National Route 151 / National Route 257 in Shinshiro, Aichi | |||
| Location | ||||
| Country | Japan | |||
| Highway system | ||||
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National Route 420 is a national highway of Japan connecting Toyota, Aichi and Shinshiro, Aichi in Japan, with a total length of 66.5 km (41.32 mi).
- ^ "一般国道の路線別、都道府県別道路現況" [Road statistics by General National Highway route and prefecture] (PDF) (in Japanese). Ministry of Land, Infrastructure, Transport and Tourism. Retrieved 11 February 2020.