Fundamentally, the Japanese are weary of people who are good talkers, equating this habit and demonstrations of such ability with unprincipled, untrustworthy behaviour.
While we can say there is also a similar attitude towards overly talkative people in the West as well, here in Japan, the negative response to people who talk way to much has a much more deeply rooted culture connotation, and far more important in the overall scheme of things even up until this very day.
