"Japanese hackers stepped up their cyber attacks on Korean Web sites in April amid the two nation's sovereignty wrangling on Dokdo, the islets in the East Sea.
The Korea Information Security Agency (KISA) said yesterday that Japan-based hackers accounted for 15.53 percent of last month's total foreign network attacks amounting to 10.8 million cases, only trailing China's 45.27 percent."
http://times.hankooki.com/lpage/tech/200505/kt2005051018085111810.htm