Basic Rules

  • 1

    Follow laws and regulations

    People who use watercraft on the rivers must navigate in a safe, orderly fashion, with proper licenses and the like.
    All watercraft that pass through the lower reaches of the Kiso Three Rivers are subject to the River Act, the Act on Preventing Collisions at Sea, the Act on Port Regulations, the Prefectural Public Nuisance Ordinance and other laws.

  • 2

    Follow proper etiquette

    To make the lower reaches of the Kiso Three Rivers safe and enjoyable for all, everyone on the water should be considerate and avoid causing problems for other people.

  • 3

    At your own risk

    Being on the water always involves risk. Thus, everyone on the water must take it upon themselves to exercise caution accordingly.

  • 4

    Protect the environment

    Rivers are invaluable places for cultivating nature.
    Everyone should constantly be mindful to avoid disrupting the workings of nature.

Low-Speed/Restricted Zones

rule 1
Illustration of Low-Speed / Restricted Zones

Navigate safely and considerately

rule 2
  • Obey the Act on Preventing Collisions at Sea, the Act on Port Regulations, and other laws on maritime transportation.
  • Pay extra attention to your wake when passing near canoes, regattas and other manually powered watercraft.
A dangerous situation where a kayak is about to capsize due to a jet ski approaching too closely

Avoid behavior that causes problems for
commercial fishing operations

rule 3
  • Exercise caution—various commercial fishing operations are underway in the Kiso Three Rivers.
  • Do not wander near or fish around the seaweed farms at the river mouths.
  • Avoid behavior that damages moored fishing boats, fishing nets and other fishing equipment.
漁船の操業を妨げるジェットスキーのイラスト
  • Freshwater clam fishing is done frequently throughout the year in all areas of the Kiso Three Rivers.

    Freshwater Clam Fishing

    Illustration of Clam Fishing
  • Fishing Along Riverbanks

    A multitude of gill nets and other fishing equipment and nets are set up along the riverbanks in all areas of the Kiso Three Rivers.

    Gillnetting

    Illustration of Gillnetting
  • Japanese Icefish Fishing and Seaweed Farming

    From January 4 to April 30 each year, Japanese icefish fishing is done on the Kiso Three Rivers downstream of National Highway 1. In addition, seaweed farmers’ fishing boats frequent the area from September to April.

    Japanese Icefish Fishing

    Illustration of Japanese Icefish Fishing
  • Net Fishing

    Nets are strung across wide areas of the channels of the Kiso River and Nagara River upstream of the Tokai Bridge for net fishing throughout the year.

    Net Fishing

    Illustration of Net Fishing

Freshwater Clam Fishing

Illustration of Clam Fishing

Gillnetting

Illustration of Gillnetting

Japanese Icefish Fishing

llustration of Japanese Icefish Fishing

Net Fishing

llustration of Net Fishing

Avoid behavior that interferes with river
management

rule 4
  • Do not install mooring facilities on the river without permission.
  • Do not moor or leave watercraft on the river for long periods of time.
  • Do not wander, dock, moor or leave watercraft near floodgates, sluiceways and other river management facilities.
  • Do not use mooring rings or posts in fishing harbors or docks without authorization.

Avoid behavior that causes problems for
other people

rule 5
  • Always take your buoys home with you.
  • Avoid causing problems for authorized users at docks and other designated areas.
  • During triathlons and other competitions, follow the instructions of event personnel.
  • Do not tow uninspected vehicles or vehicles with expired inspection certificates.

Avoid behavior that causes problems for
local residents

rule 6
  • Do not needlessly idle watercraft engines or alter them in ways that cause a nuisance.
  • Do not park inconsiderately on roads atop embankments or community roads in the area.
  • Do not drive recklessly in riverbeds.
  • Do not make excessive noise at any time during day or night.
Jet ski noise disturbing residents

Avoid behavior that could degrade the river environment

rule 7
  • Always take trash, oils and other waste home with you.
  • Always take fishing lines, fishing hooks and other equipment home with you.
  • Do not refuel watercraft in dangerous or unstable places on the water.
  • Avoid trampling through the reed fields, vegetation and other invaluable natural scenery along the riverbanks.
  • During autumn and winter, the Kiso Three Rivers are a wintering area for waterfowl. The areas upstream of Tatsuta Bridge and Nagaragawa Bridge are particularly important wintering areas, so do not drive at high speeds or wander into those areas from December to March.
Illustration of littering in a river