the anxiety in america is strikingly demonstrated in a new wall street journal/nbc poll , which shows that while 63 % of american voters say it is `` very important '' for the u.s. to be the leading economic power in the world , 69 % believe japan has already passed the u.s. fully 63 % say the japanese have leaped ahead in science and technology , and 69 % feel japan invests `` too much '' in the united states .