Tokyo stocks were modestly higher on Thursday morning, tracking an overnight rise of the U.S. Dow Jones index, while a wait-and-see mood prevailed ahead of earnings reports from major Japanese companies. The 225-issue Nikkei Stock Average rose 189.73 points, or 0.50 percent, from Wednesday to 38,392.10. The broader Topix index was up 20.62 points, or 0.76 percent, at 2,727.05. The U.S. dollar moved narrowly around the mid-155 yen zone, supported by the likelihood the U.S.-Japan interest rate gap will remain wide, while caution persisted over a potential intervention by Japanese authorities to …