Japan National Route 145

{{short description|National highway in Japan}}

{{Expand Japanese|topic=transp|date=10 December 2023}}

{{onesource|date=October 2024}}

{{Infobox road

|country=JPN

|type=National

|route=145

|maint=

|alternate_name=

|map={{Maplink2|zoom=9|frame=yes|plain=yes|frame-align=center|frame-width=300|frame-height=300|frame-latitude=36.5869|frame-longitude=138.8280|type=line|stroke-color=#cc0000|stroke-width=2}}

|map_custom=yes

|image=Kokudo 145 naganoharamachi hayashi.JPG

|length_km=49.8

|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|archive-date=24 March 2017|archive-url=https://web.archive.org/web/20170324085031/http://www.mlit.go.jp/road/ir/ir-data/tokei-nen/2016/pdf/d_genkyou26.pdf|url-status=live}}

|established=

|direction_a=

|terminus_a=

|junction=

|direction_b=

|terminus_b=

|previous_type=Route

|previous_route=144

|next_type=Route

|next_route=146

|browse=

}}

National Route 145 is a national highway of Japan connecting Naganohara, Gunma and Numata, Gunma in Japan, with a total length of {{Convert|49.8|km|mi|abbr=on}}.