I think there is a language barrier. Extra investment to program for English and other languages?
As for outsiders, the new Nissan chief was not accepted so easily, by his subordinates and even the press. Japan is very much what things in India used to be like, the guy on the top should be an old, experienced, grey haired guy, and everyone under him should make namaskara for him every day. Questioning is not encouraged. There were times that private business discussions between Japanese and American company delegations would run into trouble because of the age gap and the tendency of the Japanese to look at their counterparts as young and inexperienced. With the opening up of the Indian economy and the arrival of young entrepreneurs all that has changed. Even if you see the banking sector, if I am not mistaken, the first bank I started seeing young managers is ICICI. This trend seems to have caught on in all sectors, age is no more a bar to occupying a post.