Bonsai

• 1. Introduction

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  Bonsai is the Japanese art of growing and shaping miniature trees in containers. One specimen in the Tokyo Imperial Palace collection has been alive under human care for centuries. A five-needle pine known as Sandai Shogun, meaning the third shogun, had already been trained into bonsai form by 1610. Tokugawa Iemitsu is documented as having cared for it, and the tree is thought to be at least 500 years old. It now ranks among the National Treasures of Japan, still growing inside the same shallow-pot discipline that defines the entire art. Yet in English, the word bonsai has been stretched to cover almost any small potted plant. That slippage is one the tradition's own writers reject outright. What actually separates a true bonsai from a rooted cutting stuck in a saucer? How did this quiet container-gardening practice grow into something so distinctly Japanese? And what unwritten rules, refined over centuries, decide whether a shaped tree reads as art rather than as a curiosity?

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• 2. What Bonsai Actually Is

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  In The New York Times, writer Stephen Orr described how loosely the word bonsai gets applied in the West. He wrote that "in the West, the word is used to describe virtually all miniature container trees, whether they are authentically trained bonsai or just small rooted cuttings." He argued that the term should be reserved for plants grown in shallow containers. Those plants must follow the precise tenets of bonsai pruning and training. Used strictly, bonsai means only a miniaturized, container-grown tree shaped according to Japanese tradition and principles.

  The point of keeping one has nothing to do with the dinner table. Growers cultivate bonsai mainly for contemplation by the viewer. The grower, in turn, gets the pleasure of exercising skill and patience in the shaping itself. Bonsai are never grown for food or medicine, which sets the practice apart from most other container gardening traditions.

  Confusion often arises between bonsai and dwarfing, though the two are not the same thing. Dwarfing is research or breeding aimed at producing permanent genetic miniatures. It often relies on selective breeding or genetic engineering. Bonsai instead starts from ordinary stock and seeds. It relies on pruning, root reduction, potting, defoliation, and grafting. Together those techniques coax a small tree into mimicking a mature, full-sized one.

  That distinction, ordinary stock reshaped over years rather than bred small, matters for one more reason. It is also why bonsai's roots trace back more than a thousand years to a practice imported from China.

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• 3. Origins In China, A Japanese Reinvention

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  The Japanese art of bonsai grew directly out of the Chinese practice known as penjing. From the 6th century onward, Japanese imperial embassy officials and Buddhist students traveled to and from mainland China. They returned home with Chinese ideas and goods, container plantings among them.

  The 1195 scroll Saigyo Monogatari Emaki is the earliest known Japanese artwork to depict dwarfed potted trees. Later handscrolls carried the tradition forward. The Ippen Shōnin Eden of 1299 is one example. So is the Kasuga Gongen Genki E of 1309, which shows wooden tray and dish-like pots holding dwarf landscapes on modern-looking wooden shelves. The Boki Ekotoba of 1351 portrays dwarf trees displayed on short poles.

  Chan Buddhist monks from China, called Zen in Japanese, taught at monasteries across the country during this period. Introducing miniature landscape arts to political leaders was one way these monks marked a person as cultivated and refined. Early potted arrangements still followed Chinese fashion, crowded with miniature figurines set among the trees. Japanese artists eventually stripped that away. They sharpened the focus on the tree itself, using smaller, plainer pots and no ornamental clutter.

  Around the 14th century, the containers used for dwarf trees in Japan went by a different name entirely. That name implied a fairly deep pot, rather than the shallow one bonsai would later denote. Interest kept widening in the centuries that followed. In the Tenmei era, between 1781 and 1788, an annual exhibit of dwarf potted pines began in Kyoto. Connoisseurs from five provinces brought trees there to be ranked by visitors.

  In the early 19th century, in Itami, in Hyōgo, Japanese scholars of Chinese arts began gathering to discuss recent styles in miniature trees. Many of the terms and concepts they adopted came from a Chinese manual. It was the Jieziyuan Huazhuan, known in English as the Manual of the Mustard Seed Garden. It was this circle that renamed the older potted-tree tradition bonsai, a word connoting a shallow container rather than a deeper bowl. Even so, the term bonsai would not become the broadly used name for Japan's dwarf potted trees for nearly another century.

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• 4. An Art For The Japanese Public

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  On the 13th of October 1868, the Meiji Emperor moved into his new capital in Tokyo, and bonsai moved with him into public view. Trees were displayed both inside and outside Meiji Palace. Those set within its grand halls had to qualify as "Giant Bonsai" simply to fill the space. The emperor's own interest broadened bonsai's appeal among his government's professional staff.

  An Artistic Bonsai Concours opened in Tokyo in 1892. It was followed by a three-volume commemorative picture book, a pairing that marked a new tendency to treat bonsai as an independent art form. In 1903, the Tokyo association Jurakukai staged showings of bonsai and ikebana at two Japanese-style restaurants. Bonsai Gaho became the first monthly magazine on the subject in 1906, followed the next year by Toyo Engei and Hana. The magazine simply called Bonsai launched in 1921 and ran for 518 consecutive issues.

  In 1910, the Sanyu-en Bonsai-Dan documented a shift in shaping technique, from string, rope, and burlap toward wire. Zinc-galvanized steel wire came first. Costlier copper wire was reserved for the few trees judged to have real potential. In the 1920s and 1930s, toolsmith Masakuni I, who lived from 1880 to 1950, helped design the first steel tools built specifically for bonsai work. Among them was the concave cutter. That tool leaves a shallow indentation where a branch is removed, one that fills over with live tissue and bark, sharply reducing the usual scar.

  By 1914, Tokyo's Hibiya Park hosted the first national annual bonsai show, an event repeated every year through 1933. A separate annual exhibition began in 1927 at the Asahi Newspaper Hall in Tokyo. Starting in 1934, the prestigious Kokufu-ten exhibitions began their run in Tokyo's Ueno Park. The first major English-language book on the subject appeared around the same era. It was Dwarf Trees (Bonsai), by Shinobu Nozaki, published in the Japanese capital.

  By 1940, roughly 300 bonsai dealers were working in Tokyo, cultivating some 150 species between them. Thousands of specimens were being shipped every year to Europe and America. The first bonsai nurseries and clubs in the Americas were founded around this time, by first- and second-generation Japanese immigrants. The Second World War then cut off this growing international trade, just as bonsai was becoming a truly global pursuit.

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• 5. Bonsai Goes Global

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  The Kokufu-ten displays reappeared in 1947, after a four-year wartime cancellation. They have run as an annual, invitation-only, eight-day event every February since. In October 1964, the Nippon Bonsai Association staged a major exhibition in Hibiya Park to mark that year's Tokyo Olympics. The association had itself been reorganized from the earlier Kokufu Bonsai Association.

  A large display of bonsai and suiseki featured at Expo '70. Alongside it came the first formal talks about founding an international association of enthusiasts. In 1975, organizers held the first gafu-ten, an elegant-style exhibit devoted to shohin bonsai. Those trees measured 13 to 25 centimeters, or roughly 5 to 10 inches, tall. That same year brought the first sakufu-ten, a creative bonsai exhibit. There, professional growers show trees under their own names rather than the owner's.

  The first World Bonsai Convention convened in Osaka in 1980, held alongside the World Bonsai and Suiseki Exhibition. Nine years later, the newly formed World Bonsai Friendship Federation launched a recurring series of conventions from Omiya. These have been held every four years since, each time in a different country. Orlando, Florida hosted in 1993, followed by Seoul, Korea in 1997, Munich, Germany in 2001, and Washington, D.C. in 2005. San Juan, Puerto Rico followed in 2009, then Jiangsu, China in 2013, and Saitama, Japan in 2017. A virtual gathering based in Perth, Australia closed out 2022. The COVID-19 pandemic had postponed that event from the year originally planned.

  In 1952, Yuji Yoshimura, son of a Japanese bonsai community leader, teamed up with German diplomat and author Alfred Koehn to give public bonsai demonstrations. Koehn had been an enthusiast before the war. His 1937 book, Japanese Tray Landscapes, had already appeared in English out of Beijing. Yoshimura's own 1957 book, The Art of Bonsai, was written in English with his student Giovanna M. Halford. It went through more than thirty printings and became known as the classic Japanese bonsai bible for Westerners.

  The related art of saikei reached English-speaking readers in 1963, through Kawamoto and Kurihara's book Bonsai-Saikei. It described tray landscapes built from younger plants. That approach offered an alternative at a time when few of the old, large specimens once favored for bonsai had survived the war undamaged.

  In 1967, the first group of Westerners studied at a nursery in Ōmiya. On returning home, they founded the American Bonsai Society. Other visitors from outside Asia followed them to Japanese nurseries, some even apprenticing under local masters. Japanese teachers reciprocated, carrying hands-on bonsai instruction to all six inhabited continents.

  More than fourteen hundred books on bonsai and related arts are now in print, in at least twenty-eight languages. They sell across over one hundred and ten countries and territories. A few dozen magazines circulate in over thirteen languages, alongside score upon score of club newsletters and online forums. At least a hundred thousand enthusiasts belong to some fifteen hundred clubs and associations worldwide. Beyond them stand more than five million unassociated hobbyists.

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• 6. Shaping The Tree

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  A cutting, a seedling, or a small nursery tree can all serve as a bonsai's starting material. Not every source carries equal prestige, though. Trees collected from their original wild setting, known as yamadori, are often the most expensive of all. They are also the most prized, since moving and replanting one successfully takes real skill. Nursery stock, garden-centre plants, and specimens bought ready-shaped from commercial bonsai growers round out the other common sources.

  Leaf trimming is the selective removal of leaves or needles from the trunk and branches. It redirects a tree's energy toward the areas an artist wants to develop further. Pruning the trunk, branches, and roots controls overall size and form. Wiring lets the designer bend branches and trunks into a chosen shape and set precise leaf placement. Mechanical clamps, tension cables, or guy-wires achieve more forceful bends. Grafting inserts new material, typically a bud, branch, or root, into a prepared spot on the trunk or under the bark. Defoliation can temporarily shrink the foliage of certain deciduous species. The deadwood techniques known as jin and shari are used to simulate age and maturity in an otherwise young tree.

  Formal upright, informal upright, slanting, semi-cascade, cascade, raft, literati, and group or forest planting are the styles named most often. Formal upright trees have a straight, tapering trunk, with branches thickest and broadest near the base and thinning toward the top. Informal upright trees show visible curves in trunk and branches, yet the apex still sits directly above where the trunk enters the soil. In the slanting style, the trunk emerges from the soil at an angle. That sends the apex to the left or right of the root base, rather than above it.

  Cascade styles are modeled on trees that grow over water or down a mountainside. In the semi-cascade form, the treetop extends to roughly the pot's rim. In full cascade, it falls below the pot's base entirely. Driftwood styles portray a tree struggling to survive while much of its trunk stands bare of bark. Root-over-rock style wraps a tree's roots around a rock before they reach soil at its base. Growing-in-rock style, by contrast, lets roots take hold directly in soil packed into a rock's cracks and hollows.

  Forest or group plantings gather several trees of a single species, usually an odd number, into one pot. Certain other multi-trunk styles share a single root system, despite looking like separate trees. One further style imitates a tree toppled onto its side by erosion or another natural force. Its uppermost branches carry on growing as a fresh row of trunks. A broom style suits fine-branching trees like elms. Its straight trunk fans out partway up its height into a ball-shaped crown. A windswept style shapes a tree as though bent for years by wind from one direction. It mimics how a tree on an exposed ridge or shoreline might grow.

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• 7. Rules Of Beauty And Display

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  Zen Buddhism and the aesthetic of wabi-sabi run through nearly every rule that governs how a bonsai should look. Miniaturization is the baseline requirement, a tree kept small enough for a container while still carrying a mature, aged appearance. Proportion matters too. The most prized specimens echo a full-grown tree as closely as possible. A thin trunk topped with thick branches, or small leaves paired with an oversized trunk, reads as a flaw. Bonsai aesthetics also discourage strict radial or bilateral symmetry in how branches and roots are arranged.

  No trace of the artist should be visible in a finished tree. A scar left by a removed branch gets concealed. Any wire used to shape a branch is removed, or at least hidden, before the tree is shown, leaving no permanent mark on the bark. Many of these formal rules exist to help the tree express wabi-sabi, or to evoke mono no aware, a poignant awareness of transience.

  Bonsai writer Peter Adams recommended that a tree be shown the way a painting hangs in a gallery. He wrote that it should be displayed "at the right height; in isolation; against a plain background, devoid of all redundancies such as labels and vulgar little accessories." Outdoor displays, often left in place for weeks or months, tend toward rustic wood or stone benches. These are sometimes stepped to different heights for different sizes of tree. Specimens are spaced apart so a viewer can focus on one at a time. Indoor exhibition displays instead use a row of small alcoves, each holding a single bonsai against a neutral wall. The pot itself sits on a formal stand chosen to complement it. A traditional home display goes further still, combining the featured tree with a shitakusa companion plant and a hanging scroll. Together these suggest a foreground and a background, often set within a home's tokonoma alcove. Such an indoor arrangement rarely lasts more than a day or two before the tree loses vigor.

  A tree still being developed usually lives in a plain growing box or a smaller training box. Neither is bound by any aesthetic rule; both are chosen only for the volume of soil the grower needs. A finished bonsai, by contrast, moves into a formal ceramic pot, glazed or unglazed. It is fitted with drainage holes at the bottom and a screen to keep soil in and pests out. Evergreens are typically potted unglazed, while deciduous trees usually appear in glazed containers. Vertical sides are favored, so the root mass can be lifted out easily for pruning. Some pots are collectible in their own right, particularly antique examples from Tokoname in Japan or Yixing in China, regions long known for skilled pot-making.

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• 8. Judging The Best

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  The Shunka-en Bonsai Garden in Tokyo and the Omiya Bonsai Museum in Saitama anchor Japan's reputation for the finest specimens. There is broad consensus that the best bonsai in the world are still found there. The United States has two comparable museums. One is the National Bonsai & Penjing Museum at the National Arboretum in Washington, D.C. The other is the Pacific Bonsai Museum, near Tacoma, Washington.

  The Kokufu-ten is staged at the Tokyo Metropolitan Art Museum. It is Japan's most prestigious competition for amateur-owned trees, even though professionals typically prepare those trees for display. It is also the country's oldest bonsai competition, having marked its 97th edition in 2023. For professionals themselves, the top event is the Nippon Bonsai Sakufu-ten, organized by the Japan Bonsai Cooperative Association and held every December. Its Prime Minister Award, the competition's top prize, went to Hiroaki Suzuki in 2022, for a Shimpaku Juniper.

  Japanese exhibitions and catalogs sort bonsai into recognized size classes. A photograph alone can badly mislead a viewer about a tree's real scale, so the class name fills that gap. At the largest end, sizes are named for the number of people needed to lift the tree and pot. These range from six-handed and four-handed specimens down to two-handed and one-handed ones. Trees at this scale carry dozens of branches and closely simulate a full-size tree. The very largest class is called imperial, a name borrowed from the enormous potted trees once kept at Japan's Imperial Palace. At the opposite extreme sit mame, at 2 to 6 inches, and shito, at 2 to 4 inches. Those sizes are small enough that growers have developed techniques suited specifically to their limited branches and leaves.

  The Japanese bonsai tradition itself has no place for an indoor tree. Every specimen shown at Japanese exhibitions, or pictured in Japanese catalogs, has spent its entire life growing outdoors. Kept inside an ordinary home, temperate bonsai weaken and die. Indoor bonsai has taken hold only in less traditional settings, and in climates harsher than Japan's. It relies on tropical or sub-tropical species that can actually survive under a roof, such as the jade plant or members of the genus Ficus. A jade plant or a Ficus on a sunny windowsill can therefore carry the bonsai name today. Japan's own tradition never meant for one to leave the outdoors at all.

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