Press Release

April 23, 2015

Fisheries Research Agency

Distribution of forecast information on set-net-destroying kyucho (coastal strong currents) on the Internet
- Start of the operation of a real-time kyucho forecast system -

  • A system that forecasts the occurrence of kyucho, which damage set nets along the coast of the Japan Sea, a few days prior to their occurrence, has been developed.
  • Fishing operators can reduce damage by obtaining the forecast information via the Internet and taking preventive measures.

Along the Japanese coast, strong, sudden currents called kyucho sometimes occur. In 2004, along the coast of the Japan Sea, for example, kyucho triggered by typhoon No. 15 destroyed more than 180 set nets, causing enormous damage. Substantial damage also occurred in 2005 and 2011, resulting in a heavy blow to the business foundations of set-net fishery operators. It has become increasingly clear in recent years that kyucho are caused by various factors besides strong winds of typhoons and low-pressure systems, pointing to the need to analyze factors and scales for different waters.

Nine organizations including the Japan Sea National Fisheries Research Institute collaborated for the Development of a Real-time Kyucho Forecast System along the Coast of the Japan Sea (Science and Technology Research Promotion Program for Agriculture, Forestry, Fisheries, and Food Industries of the Agriculture, Forestry, and Fisheries Research Council) for three years, starting in 2012, and developed a method that accurately forecasts the occurrence of kyucho; subsequently, this information has been distributed via the Internet ( to the public, including fishing operators.

Fishing operators and marine leisure enthusiasts can now easily obtain information on when and where kyucho are likely to occur, as well as their scales, just like they can access the weather forecast, raising expectations that damage to fisheries will be reduced and marine safety will be ensured.

Fig. A webpage of the real-time kyucho forecast system