Last winter, Jun Saito, a Yale University teaching assistant in political science, was in New Haven surfing Web sites when an item from home caught his eye. Japan's main opposition party was looking for a sacrificial lamb to run for Parliament in a district known as a ruling party "kingdom."
Fast forward to last week: Mr. Saito, 33, was moving into a new office in Parliament, was getting used to snappy salutes from parliamentary guards, and was composing e-mails to his academic advisers, gingerly explaining that his doctoral thesis might be late.