This is fresh gist according to 2019 Henley Passport Index.
https://www.henleyglobal.com/henley-passport-index/

All you have to do is to marry a citizen of the country to have the passport or be born in that country.
Let's Start guessing.
Many people would think it would either UK or USA.

UK? No
USA? No
French? No
Australian? No
Chinese? No
Indian? No
Russian? No
Nigerian? No

Japanese citizens hold the strongest passport in the world, followed by Singapore and South Korea, as Asian countries continue to dominate the world rankings.

Japan is in first place, with its citizens able to travel visa-free or obtain a visa on arrival in 190 countries, according to the 2019 Henley Passport Index.

Japan is followed by Singapore and South Korea in joint second place, whose citizens can visit 189 destinations without getting a visa before travel. Henley & Partners says that this is the highest position that South Korea has reached on the passport index, which is based on data from the International Air Transport Association (Iata).

The “continued dominance” of Asian countries in the passport index reflects the “extraordinary effect that international mobility and migration has had on the region”, said Henley & Partners, a citizenship advisory firm.

Germany and France are ranked in third place, with access to 188 destinations without a visa; while the US and the UK continue to falter, and now sit at joint sixth place with access to 185 destinations. It marks a significant fall from 2015, when American and British passports were ranked the strongest.

It’s a similar story to the United Arab Emirates. The country now holds 22nd place (but first in the Middle East), with citizens able to access 164 countries thanks to recently inked agreements with countries including Mexico, Japan and Sierra Leone.

The October 2018 introduction of Turkish e-visas has influenced the 2019 rankings, said the passport index, as citizens of more than 100 countries – Canada, the UK and the US among them – now have to apply for a visa in advance.

But hearteningly, the index said there had been an “overwhelmingly positive” trend towards visa openness and mutual agreements between nations since the index began 14 years ago.

See the full list below. Start making Migration Plans
The following is an overview of selected countries, taken from the current 2019 global ranking of the Henley Passport Index:

1 Japan 190
2 Singapore 189
3. Germany, France, South Korea: 188
4. Denmark, Finland, Italy, Sweden, Spain: 187
5. Norway, United Kingdom, Austria, Luxembourg, Netherlands, Portugal, United States: 186
6 Switzerland 185
6 United Kingdom 185
6 United States 185
6 Portugal 185
6 Austria 185
7 Canada 184
7 Belgium 184
8. New Zealand, Czech Republic: 182
9 Malta 182
9. Iceland: 181
10. Hungary, Slovenia, Malaysia: 180
16 Cyprus 173
22 United Arab Emirates 164
27 St. Kitts and Nevis 151
28 Antigua and Barbuda 150
31 St. Lucia 145
33 Grenada 143
45 Montenegro 123
46 Moldova 122

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Most powerful passports
1. Japan

2. Singapore

2. South Korea

3. France

3. Germany

4. Finland

4. Denmark

4. Italy

4. Sweden

5. Luxembourg

5. Spain

Least powerful passports
1. Iraq 30

1. Afghanistan 30

2. Syria 32

2. Somalia 32

3. Pakistan 33

4. Yemen

5. Eritrea

Hmmmn