Jomon Period in Japan

The Jomon Period in Japan spanned from about 13,000 BCE to about 900 BCE.

After the Last Glacial Maximum, which was the coldest period during the latest Ice Age, around 21,000 years ago, the temperature became gradually warmer globally. The glaciers and ice sheets covering the earth’s surface started melting, and the sea levels became higher. And the Japanese archipelago was once again, and for the last time, separated from the Eurasian Continent around 13,000 years ago, becoming almost identical to what we see today on a map.

The woods in Shijimizuka Park in Hamamatsu. (蜆塚公園)
The woods in Shijimizuka Park in Hamamatsu. It is said that the vegetation around here hasn’t changed much since 3,000 years ago.

By that time, massive mammals, such as mammoths and Naumann’s elephants, had already been extinct, greatly changing the animal distribution on the ground. The vegetation in Japan was also beginning to change. Conifer forests, which had occupied most of the land, were, little by little, replaced by deciduous broad-leaf trees, like oak, beech, chestnut, and walnut. Since these trees bore edible nuts in autumn, people began to collect these nuts, learned to preserve them, and eventually, came to settle in one place for a long time.

An ancient village in Japan (縄文時代の集落)
Pit dwelling houses reconstructed in Shijimizuka Park, Hamamatsu.

They lived in a simple structure called a tateana-jukyo (a pit dwelling house) with a sunken earth floor and wooden pillars. It is generally understood that with these changes in people’s lifestyle, which were originally brought about by the global climatic and environmental change, the Paleolithic Period ended and the Jomon Period began.

Gadgets in the Jomon Period in Japan (縄文時代の装飾品と道具)
Left: Ornaments made of animal teeth. Right: Reproduction of the bow and arrow in the Jomon Period.

There were several other characteristics that marked the difference between the Jomon Period and the preceding Paleolithic Period. The emergence of the bow and arrow was one of them. This new hunting gear reflected the change in their hunting targets: with huge, but rather slow, elephants already gone, they had to hunt down more fast and nimble animals in the woods, such as wild boars and deer. Since those animals were difficult for them to hunt with only conventional tools like spears, the bow and arrow was a perfect replacement.

Stone tools in ancient Japan (縄文石器)
“Spearhead-type” stone tools dating back some 10,000 years ago, unearthed in Hamamatsu, Shizuoka Prefecture.

The chipped stone tools like the ones people would use in the Paleolithic Period continued to be used by the Jomon people. But they were more sophisticated and diversified. Although the technique for partially polishing a stone had been observed in the preceding era, the polished stone tools of the Jomon Period were much more refined works. The Jomon people were also able to make fishing tools, such as hooks and harpoons, out of animal bones or horns. But the metal vessel production and the full-scale rice cultivation, like the kind used with large paddies, had not yet been introduced.

Jomon Pottery

The most important difference between the Paleolithic and Jomon cultures is the emergence of earthenware in the Jomon Period. The Jomon Period is sometimes described simply as “the time people made a great number of earthenware.”

Jomon earthenware with straw-rope pattern (綱目文様の縄文土器)
Jomon pottery from the Nenbutsurin Site in Ishikawa Prefecture. (Courtesy of the Komatsu City Buried Cultural Property Center.)

In fact, there is no better representation of the period than the group of pottery with their striking designs, which appeared in the middle of the Jomon Period. Some of the pottery had elaborate “straw-rope” patterns on the surface, while others had complex “flame-like” decorations on the rim.

"Flame-type" Jomon pottery (火焔型縄文土器)
Jomon pottery pieces, that are designated as National Treasures, from the Sasayama Site in Niigata Prefecture. (Courtesy of the Tokamachi City Museum.)

There is no doubt that those earthen vessels with noticeable designs are iconic works from the period. Even today, their bold, primitive charm attracts many people, and exhibitions are occasionally held in museums. However, it is not the case that all Jomon vessels are eye-catching like those. Throughout the long Jomon Period spanning well over 10,000 years, a variety of earthenware was produced and regional differences were also observed. For instance, earthen vessels from the earliest period of Jomon are generally simple and plain ones with no patterns or decorations on the surface. Furthermore, few straw-rope patterned vessels have been discovered in the Kyushu Region, including the islands of Okinawa, throughout the Jomon Period.

It is not clear whether a pottery-making technique was originally introduced to Japan from the Asian continent or if it was invented domestically: the oldest fragments of pottery ever discovered in Japan are said to date back some 16,500 years ago. (Based on this fact, some archeologists argue that the Jomon Period starts at around this point.) They were the ones unearthed from the Odai Yamamoto Site in Aomori Prefecture in the Tohoku Region. Interestingly enough, pottery fragments from almost the same period have also been discovered in South China (at several sites along the Yangtze River) as well as in Russia (in the areas along the Amur River). But it seems that these findings are not connected.

縄文土器(Jomon pottery)
Jomon pottery exhibited in the Hamamatsu City Museum.

In any case, it is certain that earthenware brought about a big change in people’s lifestyle in the Jomon Period. It enabled people to preserve or cook their food. People came to be able to eat some kind of soup or stew with fish, shellfish, or animals.

Ancient pots of Japan (縄文土器)
Jomon pottery exhibited in the Hamamatsu City Museum.

Things like acorns and plant roots surely became easier to eat after they were boiled and their bitterness removed (bitter components were sometimes toxic). So, it is thought that thanks to earthenware, Jomon people could enjoy a far richer dietary life than their Paleolithic counterparts by taking in all of the nutrients from each of their foods.

Shell Mounds

A glimpse of Jomon people’s life can be seen by examining shell mounds, which is another feature that characterizes the Jomon Period very well. A shell mound is a place where ancient people used to dump their daily household waste. True to its name, a large amount of shells has been found there, but animal bones, bone tools, pottery fragments, and in very rare cases, human bones, can also be unearthed in their relatively well-preserved states. This is because, once shells are dumped into a pit, the calcium component from them seeps into the ground and turns the acidic soil into alkaline soil, and that prevents some materials in the same pit from easily decomposing.

The cross section of a shell mound(貝塚の断面)
The cross section of a shell mound exhibited in the Hamamatsu City Museum.

Ancient shell mounds are not unique to Japan, and many of them have been discovered all over the world. The coastal areas in North China as well as in the Korean Peninsula also have a large number of them. Out of over 25,000 shell mounds discovered in Japan, the Omori shell mound in the Kanto Region is especially famous because that is the first shell mound in the country to have been studied by academics. It was in 1877, and the excavation was led by an American zoologist named Edward S. Morse. One day, during a train trip between Yokohama and Tokyo, Morse happened to notice an area of land where a bunch of white shells was visible. Later he asked the Japanese government for permission to excavate, and the rest is history.

Excavation work at the Omori Site(大森貝塚の発掘作業)
Excavation work at the Omori Site in the late 1870s. This drawing was attached in the Morse’s 1879 report titled “Shell-Mounds of Omori.” (Courtesy of the Shinagawa Historical Museum.)

Among his many accomplishments, probably the most significant was a report published a couple of years later, in which he used the term “cord marked” to describe the pieces of pottery he found. The term was eventually translated into Japanese as “Jomon” and became the name to express the particular type of pottery as well as the whole era during which those vessels were mainly used.

 The statue of Dr. Edward S. Morse(モース博士像)
The statue of Dr. Edward S. Morse in Omori Shell Mounds Park, Shinagawa Ward, Tokyo. (Courtesy of the Shinagawa Historical Museum.)

The kanji characters for Jomon (縄文) mean “staw-rope pattern.” Today, in honor of Morse’s research, the Omori shell mound is sometimes referred to as the “birthplace of Japanese archaeology.”

Photographs on this page were,
unless otherwise noted,
taken at the Hamamatsu City Museum and Shijimizuka Park,
by Koji Ikuma, with Fujifilm X-T1 & XF 35mmF2 R WR,
or iPhone 6 Plus, on May 28 and June 26, 2020.
Courtesy of the Hamamatsu City Museum.




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