Finance Minister Taro Aso vowed Tuesday to look into why documents related to the controversial sale of state-owned land were doctored, as unconvinced opposition parties ratcheted up their criticism against the government.A day after the Finance Ministry said it found 14 altered documents, Aso reiterated his intention to stay on. Cabinet ministers said the latest revelation will hurt public trust in the government but refrained from saying whether Aso should be held responsible."As we continue to investigate the case so something like this will never happen again, it's important to regain t…READ FULL ARTICLE