Tokyo has this year become the world’s most expensive city for expatriates, pushing Luanda in Angola, which topped the list last year, down to second position. Japan has two more cities, Osaka and Nagoya, in the Top 10 list at third and tenth places, according to the Worldwide Cost of Living Survey 2012 by Mercer. Singapore (No. 6 on the list) and Hong Kong (No. 9) are the other Asian cities in the Top 10 list.