Korea holds the 3rd most powerful passport as citizens of South Korea can visit 188 countries without visa.

Japanese officially hold the world’s most powerful passport along with a tiny city-state Singapore followed by South Korea and a powerful EU nation, Germany and france.
As the passport index shows, Korea holds the 3rd most powerful passport as citizens of South Korea can visit 188 countries with or without visa.

USA Today unveiled the passport power index of more than 200 countries around the world, citing the '2018 Henley Passport Index' published by the UK consulting group Henry & Partners.
It is based on the number of countries that can travel without a visa, national recognition, and freedom level.

Japanese can visit 190 countries without a visa or arrival visa (visa issued upon arrival at the airport). Until last year, Singapore was in the top position but this month Japan took the top place by signing a non-visa agreement with Myanmar. Singapore ranks second with 189 countries.

"The passport index does not represent a diplomatic relationship, but it is clear that Asian countries are pursuing effective foreign policy," said Henry & Partners.