Should Finance Minister Naoto Kan become Japan's next prime minister on Friday, as most observers predict, it won't be the first time he will have shouldered the responsibility for cleaning up after Yukio Hatoyama. Kan succeeded him as party chairman back in 2002, when Hatoyama resigned over talks he had held with the rival party. Now, Kan seems to be swooping in again in the wake of Hatoyama's sudden resignation, hoping to limit the damage from the outgoing prime minister's disastrous nine months in power. Then as now, Kan boasts more experience in government than his predecessor and a style that could hardly be more different. His hot temper and self-made expertise might be just what Japan needs if it hopes to keep a prime minister for a period of longer than a few months.