TOKYO — Like good daughters anywhere, Mayumi and Kaori Asahara worry about their father's declining health. They are alarmed that he looks so thin and won't see a doctor. They fret that he refuses to wear the new clothes they gave him to replace his fraying old ones. But they desperately need something back from their father too. They are seeking an explanation of why the man who taught them to cherish life, even that of an ant, could be a cult leader responsible for Japan's worst terrorist attack. "I need to ask my father directly what happened," said Kaori...