|Kenya election: Security tight for Kenyatta inauguration|
Opposition leader Raila Odinga mocked Mr. Kenyatta's "coronation", saying he had not been elected legitimately.
He boycotted the re-run of the presidential poll last month.
Just under 39% of voters turned out on 26 October and Mr. Kenyatta, who officially won with 98% of the vote.
The original election on 8 August was held over again after being annulled by the Supreme Court on grounds of irregularities.