TOKYO - Prime Minister Taro Aso's top aide urged him on Friday to watch what he says, the second straight day that the Japanese leader was warned after a series of gaffes that have left some analysts wondering about his grip on power.

In the space of a few days, the outspoken 68-year-old Aso has managed to offend doctors, insult parents, upset reformers and irk ruling party barons with ties to road construction.