The forest
What grows on Dynaland
Mostly deciduous: broadleaf woods and larch. They stand bare through the winter, so you can see a long way into them.
Read from the national vegetation survey. The survey records the cut pistes as open ground, so the ski area shows up on its own.
Where this mountain sits among the others on JapowDB
Its forest stands barer in winter than 20 of the 49 mountains on JapowDB.
01
Sight range, level by level
This is the mountain seen from the side. How far you can see into the trees changes with height.
| Height | What you can see through | Bare |
|---|---|---|
| 1,598–1,708 m | | 100% |
| 1,487–1,597 m | | 100% |
| 1,377–1,487 m | | 100% |
| 1,267–1,377 m | | 99% |
| 1,157–1,267 m | | 93% |
| 1,047–1,157 m | | 79% |
| 937–1,047 m | | 79% |
| 827–937 m | | 61% |
| 716–826 m | | 42% |
| 606–716 m | | 56% |
Each reading is a share of that band's own forest, not of the mountain, and a band holding too little forest to state one is left blank. The pale bar behind the section is how much ground sits at that height, so a swing over a sliver of mountain does not read as a headline. No treeline is drawn — the survey describes stands, not a line.
02
What stands beside each run
Each run is scored on the band 35 to 90 m either side of its centre line, which is the forest you look at from the piste. Runs are ordered by how much of that band you can see through in winter.
| Run | The band either side | See-through |
|---|---|---|
| Umanose Tree Run 649 m | 75% | |
| Jinchu A Course 985 m | 67% | |
| Beta-Alpha Summit Connecting Course 726 m | 63% | |
| Challenge Tree Run 272 m | 60% | |
| Challenge C Course 343 m | 60% | |
| Challenge B Course 262 m | 60% | |
| Paradise A Course 1,984 m | 59% | |
| Kumadana Course 461 m | 54% |
The other 14 runs
| Run | The band either side | See-through |
|---|---|---|
| Paradise B Course 435 m | 54% | |
| Skyline B Course 1,289 m | 53% | |
| Rabbit Course 718 m | 51% | |
| Otome Course 929 m | 47% | |
| Jinchu B Course 294 m | 46% | |
| Skyline A Course 1,195 m | 46% | |
| Otome Tree Run 251 m | 44% | |
| Paradise Tree Run 365 m | 43% | |
| Downhill Course 1,429 m | 36% | |
| Mogul Course 367 m | 34% | |
| Jinchu Slalom Bahn 320 m | 26% | |
| 1st Gelande 490 m | 24% | |
| Karamatsu Gelande 397 m | 22% | |
| 6st Gelande 374 m | 20% |
Each figure is a share of the surveyed ground in a band 35–90 m either side of the run. The run itself and the rest of the mountain are outside it. The survey resolves about 14 m on the ground and the band is only a few cells wide, so the figure covers what the band is made of and cannot single out one tree, gap or line of sight. Runs the survey barely covers are left out. The survey has no treeline and no stem-density data.
03
What actually grows here
The survey sorts every polygon into one of its vegetation zones, then names the stand within it. A mountain usually falls into five or six zones, each holding many named stands.
| Vegetation zone | Share of classified ground | Share |
|---|---|---|
| Beech-zone regrowth ブナクラス域代償植生 | 48% | |
| Natural beech-zone forest ブナクラス域自然植生 | 26% | |
| Plantation and farmland 植林地・耕作地植生 | 22% | |
| Natural subalpine conifer forest コケモモ－トウヒクラス域自然植生 | 2% | |
| Other その他 | 2% | |
| Evergreen broadleaf-zone regrowth ヤブツバキクラス域代償植生 | 1% | |
| Alpine natural vegetation 高山帯自然植生域 | 0% |
The named stands underneath
The survey’s own community names, largest first. These are proper names for stand types, and the survey publishes them only in Japanese.
- オオバクロモジ－ミズナラ群集 40%
- チシマザサ－ブナ群団 26%
- スギ・ヒノキ・サワラ植林 17%
- ススキ群団（V） 4%
- コナラ群落（V） 3%
- チシマザサ群落（II） 2%
The other 12 communities
- カラマツ植林 2%
- 緑の多い住宅地 2%
- 水田雑草群落 1%
- ササ群落（V） 1%
- 畑雑草群落 1%
- ユキグニミツバツツジ－アカマツ群集 1%
- 路傍・空地雑草群落 1%
- チシマザサ群落（IV） 0%
- 放棄畑雑草群落 0%
- 雪田草原 0%
- なだれ地自然低木群落 0%
- 開放水域 0%
Every share is of the ground the survey classified on this mountain, which is more than the forest and more than the ski area. The zones are the survey’s own; the English is a gloss and the Japanese is the source term. Zones are ordered by area, and area has no bearing on how well a zone skis.
04
How natural this vegetation is
The survey grades every polygon on a ten-point scale of how little people have changed it. Level 1 is made ground with almost nothing growing on it; level 10 is natural grassland and alpine heath. The scale measures human interference only. Natural fir sits at 9 and is a wall you cannot see through; a larch plantation sits at 6, evenly spaced and good to ski.
| Level | Share of classified ground | Share |
|---|---|---|
| 10 | Natural grassland and alpine heath | 2% |
| 9 | Natural forest | 26% |
| 7 | Secondary forest | 43% |
| 6 | Plantation | 19% |
| 5 | Tall secondary grassland | 6% |
| 4 | Short secondary grassland | 1% |
| 2 | Farmland and green residential land | 4% |
A fraction of a percent of the classified ground carries a code outside the ten levels. It is left out of the rows above.
Every share is of the ground the survey classified on this mountain. The scale records human interference only; a higher level does not mean better skiing. Levels this mountain does not have are left out.
National vegetation survey, 2024 edition, Biodiversity Center, Ministry of the Environment, Japan. Processed by JapowDB; the Ministry did not produce this version.
This mountain's polygons were walked in 2007. The edition is dated 2024; the fieldwork is older.
Each cell is about 14 m across, roughly the size of a small clearing.