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| 国道378号 | ||||
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| Route information | ||||
| Length | 124.1 km[1] (77.1 mi) | |||
| Location | ||||
| Country | Japan | |||
| Highway system | ||||
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National Route 378 is a national highway of Japan connecting Iyo, Ehime and Uwajima, Ehime in Japan, with a total length of 124.1 km (77.11 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 12 February 2020.