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Details of private vehicle traffic restrictions

The purpose and background of private vehicle traffic restrictions

Oirase Stream is all of our property.
Everyone has the right to enjoy it.



On the other hand, a rise in vehicles pour in during the tourist season causing various problems, such as traffic congestion and other environmental concerns. Also, the National Highway No.102 along the mountain stream doubles as a local road with an industrial area because a segment of the road bypasses a mountain stream leading to difficulties passing large-size vehicles.

To solves these problems ˹ The Aobunazan bypass ˼ which detours the Oirase Stream has been safely industrialized from 2013.

Although trials of private vehicle traffic restriction aimed at the conservation of nature and traffic congestion has so far been tackled by the Oirase Stream Use Optimization Conference, measures have developed monitoring entrance regulations of full scale vehicles and continuing annual trials regulating vehicle types. Thank you for your understanding and cooperation.


The Oirase Stream private vehicle traffic restrictions

Restricted time
October 26(Thu),2017 27th(Fri) 10 a.m.~2 p.m.
October 28(Sat),2017 29th(Sun) 9 a.m.~3 p.m.

Restricted section

General National Highway No.102 section {Soube intersection through Nenokuchi intersection} about 10 km (about 6.2 miles)

Restricted models

Vehicles, motorcycle (include motorbike)

Please keep mind that a rental vehicle also serves as a control vehicle.

No restricted models

Buses, large-size vehicle, mid-sized vehicle, and taxi may pass, but please adhere to environmental regulations.▶Individuals with a difficulty walking who may pass.

Restricted section

General National Highway No.102 section {Nenokuchi intersection through Aobunazan intersection} about 6 km (about 3.7 miles)

Restricted models

Large size vehicle, specific mid-size vehicle

Vehicle total weigh 8 or more tons, Maximum loading capacity 5 or more tons, the passenger capacity 11 or more


Sharp curve and a steep slope ahead. The Nanamagari section is used as a detour therefore passing large-sized vehicle is prohibited.