Japan's Unique Geography and Prehistoric Jomon Society

Key Insight

Japan's distinctiveness stems from its unique geography and environment. Spanning 146000 square miles, it is significantly larger than Britain and lies further from mainland Asia, 110 miles from South Korea and 460 miles from China, fostering greater isolation. As the world's wettest temperate country, with rainfall up to 160 inches annually concentrated in summer, Japan boasts the highest plant productivity in temperate zones. Despite 80 percent of its land being mountainous and only 14 percent farmland, it supports the world's most densely populated major society relative to its cultivable area. During Ice Ages, land bridges connected Japan to Russia and Korea, facilitating human arrival as early as 500000 years ago, evidenced by stone tools similar to those from both northern and southern Asian mainlands.

Around 13000 years ago, glacial melting dramatically improved Japan's climate, increasing temperatures, rainfall, and plant productivity. Productive deciduous nut forests expanded, and rising sea levels severed land bridges, creating a vast archipelago with rich shallow seas and coastlines teeming with seafood. This era marked the first decisive change in Japanese history: the invention of pottery 12700 years ago in Kyushu, the world's oldest known. Pottery enabled boiling, steaming, and leaching toxins from foods like acorns, expanding available resources, leading to an estimated population increase from a few thousand to 250000. This innovation allowed Jomon people to become sedentary hunter-gatherers, a rare lifestyle for the time, leveraging Japan's exceptionally productive environment thousands of years before intensive agriculture arrived.

Jomon society, named after its characteristic 'cord marked' pottery, developed a remarkably diverse and balanced diet over 10000 years. They consumed nuts (chestnuts, walnuts, acorns), 64 identified edible plant species, and an array of seafood, including harpooned tuna, salmon from rivers, and gathered shellfish, with skeletal evidence indicating frequent diving. Hunting of wild boar and deer was common, and rudimentary slash-and-burn agriculture, possibly involving non-native mainland crops like buckwheat, contributed minorly to their diet. This sedentary hunter-gatherer lifestyle is confirmed by evidence of heavy stone tools, substantial semi-underground houses in villages of over a hundred dwellings, and cemeteries. Despite high population densities for hunter-gatherers, Jomon society lacked intensive agriculture, metal, writing, weaving, or significant social stratification, remaining a stable, largely isolated miniature universe with minimal external influence.