'Friction' has developed between North Korean leader Kim Jong-Il and his youngest son, who has been touted as most likely to take over the isolated communist state, a Japanese news report said Wednesday. An angry Kim has even ordered state news agencies to temper praise of Kim Jong- Un and talk of any succession, Japan Broadcasting Corp. (NHK) said on its Internet news site. Around July, Jong-Un 'made moves over personnel matters of the military without consulting his father and angered' leader Kim, the national network said, citing several unnamed South Korean sources. The chill in relations between the pair, coupled with Kim's apparently improving health, could affect any succession, the report said. Speculation began in earnest after Kim, now 67, suffered a stroke around August 2008. 