New Tokyo Gov. Yuriko Koike repeated her pledge to shake up politics in the capital in response to voters' demands for change as she assumed office Tuesday.

"This wasn't just a slogan I used for the election," Koike said during her inaugural news conference at Tokyo Metropolitan Government headquarters in Shinjuku Ward.

Koike, Tokyo's first female governor, said she will start off her term with an overhaul of the metropolitan government's organization and duties in a push to produce more tangible results.