Separate plant categories from design styles
The old article mixes evergreen or flowering categories with styles and techniques. These are different questions. A species or seasonal category tells you something about the plant; a style describes how a tree is composed. Wiring and pruning are techniques used to develop a design, not styles themselves.
Read the major forms
| Form | What to look for | Useful caution |
|---|---|---|
| Formal upright (chokkan) | An upright trunk with clear taper and ordered branching. | “Formal” does not mean every branch must be evenly spaced. |
| Informal upright (moyogi) | A trunk that changes direction while the apex remains over the base. | Movement should read as one coherent line, not a series of unrelated bends. |
| Slanting (shakan) | A trunk grows at an angle, balanced by roots and branch placement. | Pot and tie-down must make the composition stable. |
| Cascade / semi-cascade (kengai / han-kengai) | The trunk or foliage descends below the container rim. | Needs a secure, deep container and a design that does not look merely tipped over. |
| Windswept (fukinagashi) | Branches and foliage suggest a persistent directional force. | Do not equate a one-sided silhouette with a believable wind story automatically. |
| Forest / group (yose-ue) | Multiple trunks form one landscape with depth and hierarchy. | There is no universal rule that all groups need an odd number of trees. |
| Root-over-rock (sekijoju) | Roots grip a stone and continue into the soil below. | Root health and years of development come before the final reveal. |
Let the material guide the style
A design begins with the tree’s health, trunk, roots and branch options. A style name can clarify an intention, but forcing a straight tree into an extreme cascade or stripping useful foliage to satisfy a diagram can damage the plant. Species habits, climate and the tree’s history constrain what is practical.
Not every bonsai attempts to be a literal miniature of a full-size tree. Some works are expressive, abstract or shaped by a particular exhibition context. Use style terms to compare and communicate; do not use them to dismiss a tree that follows a different visual logic.
Use precise names, then describe what you see
Japanese terms have romanization variants, and English usage is not always consistent. If a term matters, give the Japanese spelling and a plain-language definition. For example, yose-ue refers to a group or forest planting. Do not repeat “Yosueue,” a misspelling present in the old archive.
When evaluating a tree, describe observable features first: trunk direction, taper, root spread, branch hierarchy, foliage mass and relation to the container. This is more useful than applying a style label as if it were a score.
Style illustrations should use verified, permission-cleared trees with the visible trunk line and planting annotated. The archive’s historic image has no confirmed identity or reuse rights.
Sources and further reading
- Know Your Styles — National Bonsai FoundationMuseum curator’s overview of major bonsai forms including cascade, upright, root-over-rock, forest and windswept.
- Bonsai Tree Style Guide — Bonsai Society of Greater CincinnatiSociety reference for common styles; terminology should be checked against context.
- Bonsai: Growing Miniature Trees — RHSHorticultural context for care alongside stylistic description.