Japan

Latvia leads global literacy rankings at 99.9 percent adult literacy, with Estonia, Lithuania, and a cluster of Eastern European, Northern European, and East Asian countries reporting rates above 99 percent. More than 30 countries have effectively achieved universal adult literacy. At the other end of the spectrum, Niger's adult literacy rate stands at approximately 19 percent — the world's lowest. This ranking covers the top 15 highest-literacy countries using UNESCO Institute for Statistics data, with methodology, caveats, and analysis of what literacy actually measures.

Japan's women live to an average of 87.7 years — the longest female life expectancy ever recorded for a large country. At the national level, Hong Kong leads all territories at 85.5 years, while Japan tops sovereign nations at 84.7. This is a story of diet, healthcare, culture, and the biology of longevity.

Italy, Japan, and Mexico top most global food rankings. France invented fine dining. China has the world's most diverse cuisine. But 'best food' is culturally contested — here's what the data on Michelin stars, UNESCO food heritage, and culinary tourism actually shows about the world's greatest food cultures.

Singapore consistently ranks first in global infrastructure quality — its port is the world's second busiest, its airport perpetually wins best-in-world awards, and its road network has near-zero potholes. Japan and Germany follow. The US scores surprisingly low given its wealth. Here's what world-class infrastructure looks like and what it costs.

The United States has 89.7 million pet dogs — the most of any country. Brazil has the highest dog ownership rate in South America. Romania has Europe's most severe stray dog problem. There are an estimated 900 million dogs globally, of which only 25% are pets. Here's the full ranking.

The Maldives has the world's highest marriage rate — 20 per 1,000 people — driven by easy divorce and remarriage. In contrast, Japan's marriage rate has hit record lows and South Korea is in a full-scale marriage crisis. Western Europe is seeing marriage replaced by cohabitation. Here's how marriage patterns define societies.

The United States has roughly 62 million pet cats — the most of any country. Russia has the highest cat ownership rate per capita at 59% of households. Japan's cat culture is a global phenomenon. There are an estimated 600 million domestic cats worldwide. Here's the full ranking of cat ownership by country.

The 22 largest pension markets held about $68.3 trillion at the end of 2025, and the United States alone held roughly two-thirds. Measured against GDP, Denmark, Iceland, Switzerland, Canada, and the Netherlands lead. Here is how the rankings work and what they miss.

Japan has over 92,000 centenarians — more than any other country. But per capita, the Sardinian highlands of Italy and Okinawa, Japan have long puzzled scientists with longevity rates that exceed even national averages. These 'Blue Zones' reveal what extreme old age actually requires.