Japan National Route 400
{{Infobox road/shieldmain/|province=¬|state=Japan|type=National|county=|route=400|subtype=}}
{{Infobox road/name/|province=¬|state=Japan|type=National|subtype=|route=400|county=}} | |
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| Route information | |
| Length | 225.7 km (140.2 mi) |
National Route 400 is a national highway of Japan connecting Mito, Ibaraki and Nishiaizu, Fukushima in Japan, with a total length of 225.7 km (140.24 mi).
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