At the end of 2018, the South Korean Navy destroyer Gwanggaeto the Great  (KDX-I) irradiated the Japanese maritime SDF patrol aircraft (P-1) with a fire control radar (FC radar) within the Japanese EEZ of the Sea of Japan.  South Korean government has denied the radar irradiation, and never proposed any preventive measure even though the Japanese government has asked for from the beginning of this incident.  Why there is no productive cooperation between Japan and South Korean governments?    I think there are two reasons.   Strong anti-Japanese sentiment in South Korea prevents the South Korean government from admitting the wrongdoing and apologizing to Japan South Korea signals China that it is strengthening the confrontational attitude against Japan.   Most Americans seem to think that it is only "Japan-Korea issue." However, a functional alliance between Japan and South Korea is also very important for the US.  A similar incident happened before. Chinese People's Liberation Army’s frigate ship…