By Shinichi Saoshiro
TOKYO, Aug 29 (Reuters) - The dollar dropped to a four-month low against the yen early on Tuesday after the Japanese and South Korean governments said North Korea had fired a missile that passed over northern Japan. dollar was down 0.5 percent at 108.725 yen JPY= after hitting 108.330, its lowest since April 18.
The greenback was already on the defensive, particularly against the euro, after Federal Reserve Chair Janet Yellen did not mention monetary policy at a central bankers' summit in Jackson Hole last week, and as European Central Bank President Mario Draghi's held back from talking down the euro at the same meeting.
The euro was down 0.1 percent at $1.1965 EUR= following an ascent to $1.1986, its highest since January 2015. (Editing by Sandra Maler)