Koshibu Dam

{{Expand Japanese|小渋ダム|topic=struct|date=July 2011}}

{{Infobox dam

| name = Koshibu Dam

| image = Koshibu dam.jpg

| name_official = 小渋ダム

| dam_crosses = Tenryū River

| location = Nagano Prefecture, Japan

| dam_type = A

| dam_length =

| dam_height =

| dam_width_base =

| dam_width_crest =

| dam_volume =

| spillway_type =

| spillway_capacity =

| construction_began = {{start date|1961}}

| opening = {{start date and age|1969}}

| cost =

| owner = Chūbu Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism

| res_name = Koshibu Lake

| res_capacity_total =

| res_catchment = 288 km² (111.2 mi²)

| res_surface =

| res_max_depth =

| plant_operator =

| plant_turbines =

| plant_capacity = 9.5MW
6.5MW
0.55MW

| plant_annual_gen =

| plant_commission =

| plant_decommission =

| location_map =

| location_map_size =

| website =

| extra =

| purpose = Flood control, irrigation, power generation

| plant_name = Koshibu Number 1 Power Plant
Koshibu Number 2 Power Plant
Koshibu Number 3 Power Plant

}}

Koshibu Dam ({{langx|ja|小渋ダム}}) is a dam in the Nagano Prefecture, Japan, completed in 1969.{{Cite web|url=http://damnet.or.jp/cgi-bin/binranA/enAll.cgi?db4=1021|title=Koshibu Dam ［Nagano Pref.］ - Dams in Japan}}