TOKYO -- When Shinjiro Koizumi takes over as Japan's new environment minister, the 38-year-old lower house member will have a chance to prove that he can walk the walk.
The post marks a coup for Koizumi, who will become the youngest male cabinet member in postwar Japan. Prime Minister Shinzo Abe's cabinet reshuffle caps a monthlong span that has seen Koizumi's political star rise even faster.
