Japan has more than 125,000 people aged over 100 — the highest number anywhere on Earth — and Okinawa has long been studied as one of the places where people live longest. That single statistic sits behind a great deal else about the country: an ageing population shapes its economy, its robotics industry, its housing market and its politics more than any other single force.
Below, the facts are grouped by what they actually explain — the geography, how daily life is organised, and the history that still shows. There is also a section on the things outsiders commonly believe about Japan that are not accurate.
The land: unstable, crowded, mostly empty
- Japan is around 73% mountainous, which is why almost everyone lives on a narrow strip of coastal plain. The Tokyo–Osaka corridor holds a large share of the population on a small share of the land.
- The country sits on four tectonic plates and records around 1,500 earthquakes a year that people can feel. Most cause no damage; building codes assume constant movement.
- Japan is an archipelago of more than 14,000 islands — a figure revised upward in 2023 when finer mapping recounted them. Only a few hundred are inhabited.
- Mount Fuji is an active volcano, not a dormant one. Its last eruption was in 1707.
How daily life is organised
- Trains are measured against seconds, not minutes. Average annual delay on the Tokaido Shinkansen is routinely under one minute, including weather and natural disasters. If a train leaves early, that is treated as a fault.
- There are roughly 4 million vending machines — one of the highest densities in the world — selling drinks, hot food, umbrellas and more.
- Slurping noodles is not rude. It cools the noodles and is a normal part of eating ramen or soba.
- Many schools have no janitorial staff. Pupils clean their own classrooms, corridors and toilets as part of the school day — framed as a lesson in responsibility rather than a cost saving.
History that is still standing
- The world’s oldest continuously operating company was Japanese. Kongō Gumi, a temple-building firm, was founded in 578 AD and operated independently for over 1,400 years before being absorbed by a larger group in 2006.
- Japan was largely closed to the outside world for over two centuries. Under the sakoku policy from the 1630s to 1853, foreign contact was tightly restricted, which is a large part of why its culture developed so distinctly.
- The imperial line is the oldest continuous hereditary monarchy in the world, traditionally dated back well over a millennium.
Language and writing
- Japanese uses three scripts at once. Kanji (characters borrowed from Chinese), hiragana and katakana appear together in ordinary sentences, each doing a different job.
- Literacy is near-universal despite that complexity — schoolchildren learn over 2,000 kanji before leaving compulsory education.
Four things people get wrong about Japan
- “Everyone lives in tiny apartments in Tokyo.” Tokyo is dense, but most of Japan is rural and emptying — thousands of rural homes stand abandoned, and some municipalities give them away to attract residents.
- “Japan is technologically ahead in everything.” Consumer robotics and rail are advanced; fax machines, cash payment and paper-based bureaucracy remained widespread far longer than outsiders expect.
- “Sushi means raw fish.” Sushi refers to the vinegared rice. Raw fish alone is sashimi, which is not sushi at all.
- “Bowing replaces handshakes in business.” Both are used, and with foreigners a handshake is common. The depth and duration of a bow carry meaning, which is why visitors are rarely expected to get it exactly right.
Frequently asked questions about Japan
Why do so many people in Japan live to 100?
A combination of diet, active daily life, universal healthcare and strong social ties is usually cited. Okinawa in particular has been studied for decades, though researchers caution that its advantage has narrowed as diets have changed.
How many earthquakes does Japan have?
Around 1,500 felt earthquakes a year, because four tectonic plates meet beneath the archipelago. The overwhelming majority cause no damage, and construction standards are designed around the assumption of frequent movement.
Is Mount Fuji active?
Yes. It is classed as active, with its most recent eruption in 1707. It is monitored continuously.
Why does Japanese use three writing systems?
Kanji carries meaning and came from Chinese; hiragana handles grammar and native words; katakana is used mainly for foreign loanwords and emphasis. They appear together in a single sentence, each signalling something about the word it writes.