Sankei Shimbun reported on February 16, 2018 that China and North Korea have tried to jam radio communication especially air traffic control and some flight departing or landing at Narita Airport have been affected several times.
Japanese government requested to Chinese government to get rid off the interference while reporting to ITU about North Korean attempts as Japan has no diplomatic relations with that country.
One such a case was May 2016, when jamming was directly aimed at air traffic radio communication between control tower of Narita and aircraft. The same frequency of radio wave was beamed and the Narita tower switched to other frequency to avoid danger.
North Korea, too, beamed a similar jamming radio wave toward aviation traffic communication of Narita. Those jamming from the two countries may disturb radio communication with fishing vessels in distant seas from Japan.
International Monitoring Network
To counter with those jamming from China and North Korea, Japan will show initiative to construct a monitoring network for those unwelcome radio transmission with Vietnam, the Philippines, and Indonesia.
Installing state-of-the art shortwave monitoring equipments at each country, it will allow to tracking the exact source of such jamming.
Operation of this monitoring network will start in 2020.
Those three countries, too, are having a tense relations with China over East China Sea territorial disputes, reporting frequent jamming from China as it is assumed and causing negative effect to ships and aircraft trafficking.
Tokyo expects more stringent request to China to eradicate such jamming once the international network of monitoring with Vietnam, the Philippines and Indonesia starts operation as it would be able to track exact source of such transmission.
Why do they try to jam our communication?
Having a tension too over East China Sea, Japanese vessels have reported frequent communication disturbance by Chinese jamming. Each time as the government requested to Chinese counterpart to get rid of that, such jamming became less right after such requests, but it usually becomes rampant again soon.
North Korea has tried to disturb radio program aired toward the closed country by a Japanese private organization calling for release of abducted Japanese nationals by North Korea by transmitting jamming.■