Japan National Route 340
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|Length||253.1 km (157.3 mi)|
|National highways of Japan|
Expressways of Japan
National Route 340 has a total length of 253.1 kilometres (157.3 mi).
- "一般国道の路線別、都道府県別道路現況" (PDF) (in Japanese). Retrieved 8 October 2019.
- Media related to Category:Route 340 (Japan) at Wikimedia Commons
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