Tokyo, Sept. 20 (Jiji Press)--Agriculture minister Shinjiro Koizumi officially announced his decision Saturday to run in the Oct. 4 leadership election at Japan's ruling Liberal Democratic Party. Unveiling his candidacy at a press conference in Tokyo, Koizumi, 44, said that he will "take up the challenge with determination to lead the rebuilding of the LDP." Koizumi said that, if he is e...