Here are the 5 most expensive cities for expat living, according to consultant firm Mercer UK:

1. Tokyo
2. Osaka
3. Moscow
4. Geneva
5. Hong Kong

The Mercer survey, considered the world’s most comprehensive cost of living survey, is aimed at firms thinking of sending workers abroad. The survey covers 143 cities across six continents and looks at more than 200 factors, including the cost of housing, transport and food.

Different “winner” last month
Last month, a different survey, by ECA International,  looked at a wider range of cities and deemed Angola’s capital, Luanda, the most expensive in the world for foreign workers. It reported that a meal there could cost more than $100 and a “decent” apartment could be as much as $15,000 a month, despite the fact that most Angolans live in poverty.

Pictured: Tokyo subway map.