Japan National Route 151

{{short description|Road in Japan}}

{{onesource|date=October 2024}}

{{Expand Japanese|topic=transp|date=October 2024}}

{{Infobox road

|country=JPN

|type=National

|route=151

|maint=

|alternate_name=

|map={{Maplink2|zoom=8|frame=yes|plain=yes|frame-align=center|frame-width=300|frame-height=450|frame-latitude=35.1401|frame-longitude=137.66791

|type=line|stroke-color=#cc0000|stroke-width=2

}}

|map_custom=yes

|image=R151 Tawagane tunnel north.jpg

|length_km=137.4

|length_round=

|length_ref={{cite web|title=一般国道の路線別、都道府県別道路現況|trans-title=Road statistics by General National Highway route and prefecture|url=http://www.mlit.go.jp/road/ir/ir-data/tokei-nen/2016/pdf/d_genkyou26.pdf|language=ja|publisher=Ministry of Land, Infrastructure, Transport and Tourism|access-date=19 February 2020}}

|established=

|direction_a=North

|terminus_a=Prefectural Route 8 / Prefectural Route 15 in Iida, Nagano

|junction=

|direction_b=South

|terminus_b={{jct|country=JPN|Route|1|Route|247}} in Toyohashi, Aichi

|previous_type=Route

|previous_route=150

|next_type=Route

|next_route=152

|browse=

}}

National Route 151 is a national highway of Japan connecting Iida, Nagano and Toyohashi, Aichi in Japan, with a total length of 137.4 km (85.38 mi).