TOYOTA CITY, Japan, June 17 : Toyota Motor shareholders re-elected Akio Toyoda as chairman and backed new CEO Kenta Kon as a board member on Tuesday, endorsing the automaker's leadership at the first annual meeting held during Kon's tenure. Shareholders also approved the re-election of four other directors.  The approvals highlight investor support for the course set out by the world's top-selling automaker, which has seen hybrid vehicle sales grow in markets like the U.S. and Japan. Speaking