Tokyo stocks extended losses Wednesday morning as a comparatively firm yen against the U.S. dollar coupled with geopolitical concerns following the Democratic People's Republic of Korea's (DPRK) launch of an intercontinental ballistic missile a day earlier, saw investors in a risk off mood.

The 225-issue Nikkei Stock Average dropped 103.56 points, or 0.52 percent, from Tuesday to 19,928.79.

The broader Topix index of all First Section issues on the Tokyo Stock Exchange, meanwhile, lost 4.02 points, or 0.25 percent, to 1,605.68.

Real estate, mining and marine transportation-linked stocks comprised those that declined the most by the morning break.