Many foreign invested companies in Japan noticed the peculiarity of Japanese customs and one of them is that the frequent changes of the president is tend to lose the customers' trust.
Some foreign companies take the position of the president/managing director in Japan as just a testing career path for the head offices' persons.
But just 1 year turn over of the president causes the lost of the trust. In order to avoid this negative situation, many such companies re-define the term of the contract for the president longer.
Actually , this cause another issue, which is that the managing directors with poor performance or lots of troubles, stay longer although normally should have been fired (of course, they are not as bad as criminal or illeagal stuff), because frequent change loses the customers' trust.
That's really annoying. For such companies, many capable or able employees will leave.