The Economist report has analyzed 60 cities across 49 indicators spanning digital, climate, infrastructural, health and personal security concerns, and found Tokyo to be the safest.

The index’s key findings include:

• As in 2015, Tokyo tops the overall ranking. The Japanese capital’s strongest performance is in the digital security category while it has risen seven points in the health security category since 2015. However, in infrastructure security, it has fallen out of the top 10, to 12th.
• In many cities, security is falling rather than rising: With two exceptions (Madrid, which is up 13 points and Seoul, up six), cities tend to have fallen in the index since 2015 (for example, New York is down 11, Lima is down 13, Johannesburg is down nine, Ho Chi Minh City is down ten and Jakarta is down 13).
• Asian and European cities remain at the top of the index: Of the cities in the top ten positions in the overall index, four are East Asian cities (Tokyo, Singapore, Osaka and Hong Kong), while three (Amsterdam, Stockholm and Zurich) are European.
• Asia and the Middle East and Africa dominate the bottom of the index: Dhaka, Yangon and Karachi are at the bottom of the list. Of the ten cities at the bottom of the overall index, three are in South-east Asia (Manila, Ho Chi Minh City and Jakarta), two are in South Asia (Dhaka and Karachi) and two are in the Middle East and Africa (Cairo and Tehran).
• Security remains closely linked to wealth but the scores of high-income cities are falling: While cities in developed economies dominate the top half of the index (with the lower half dominated by cities in poorer countries), of the 14 cities in high-income countries, the security scores of ten have fallen since 2015.
• Income is not the only factor governing city performance on security: Most of the cities in the top ten of the index are high income or upper middle-income cities. However, two high-income cities in the Middle East (Jeddah and Riyadh) fall below position 40 in the index.
• America’s failing infrastructure is reflected in its cities’ rankings: No US city makes it into the top ten in this category and only San Francisco appears in the top 20. The top ten cities in this category are either in Europe (Madrid, Barcelona, Stockholm, Amsterdam and Zurich) or Asia-Pacific (Singapore, Wellington, Hong Kong, Melbourne and Sydney).
• However, the US performs well in digital safety: Of the cities in the top ten in this category, four are North American (Chicago, San Francisco, New York and Dallas).

http://safecities.economist.com/safe-cities-index-2017