Japan National Route 21
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| 国道21号 (Kokudō Nijūichi-gō?) | |
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| Length: | 101.4 km (63.0 mi) |
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National highways of Japan Expressways of Japan |
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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.
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