Japan National Route 21
| National Route 21 | ||||
|---|---|---|---|---|
| 国道21号 | ||||
| Route information | ||||
| Length | 101.4 km (63.0 mi) | |||
| Existed | 4 December 1952–present | |||
| Major junctions | ||||
| East end | National Route 19 in Mizunami | |||
| West end | National Route 8 in Maibara | |||
| Location | ||||
| Country | Japan | |||
| Highway system | ||||
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National Route 21 (国道21号, Kokudō Nijūichi-gō) is a national highway connecting Mizunami, Gifu Prefecture and Maibara, Shiga Prefecture in Japan.