hackernews client

Daisugi, the Japanese technique of growing trees out of other trees (2020)

100 pointsposted 8 hours ago

33 Comments

operation_moose

8 hours ago

Isn't this just Pollarding and/or Coppicing, which have been practiced for at least 2000 years in Europe (and probably many other cultures as well), with a healthy dose of orientalism added on top?

cwillu

7 hours ago

From the twitter thread this was stolen from:

“It is a little different, more like pollarding, and it doesn't work with any other conifers than saplings from one specific mutant cedar in a shrine near Kyoto.”

https://xcancel.com/wrathofgnon/status/1250287741247426565

thrownawaysz

7 hours ago

>with a healthy dose of orientalism added on top

Also known as 'Thing, Japan'. HN eats up articles like this every single week.

https://knowyourmeme.com/memes/thing-japan

quadrifoliate

2 hours ago

> Also known as 'Thing, Japan'. HN eats up articles like this every single week.

And invariably the top comment is a "Thing Also in Europe/US" smugly citing that the commenter knows about something that's vaguely similar which happens to be in their neck of woods rather than Japan; and therefore makes the article irrelevant (this part is never adequately explained).

The most recent one I remember was reacting to something about konbinis by saying "So what, Poland also has lots of convenience stores".

jrowen

5 hours ago

This is such an interesting subtext. I think the original comment was a bit unfair to call it "just pollarding," at the least it's a very specific subtype that has its own culture and clear uniqueness.

Your comment feels somewhat reductive as well, you could basically replace "Japan" with a lot of things that are appreciated by some sizable subset of HN readers.

But, for some reason Japan does seem to inspire a certain fervor in both the otakus and weeaboos and their inverses. I think it's because it's the closest thing to an alien civilization for Westerners.

chmod775

4 hours ago

If it makes you feel any better, the reverse holds as well. Grass is greener mentality exists everywhere.

quadrifoliate

2 hours ago

Please link a photo of a coppice/pollard in Europe that's as straight as this, along with the location where I can see it.

If you do, I have got a great new travel destination. If you don't then everyone else (and hopefully you too) will understand why people think this is special enough to link beyond the fact that it happens to be in Japan.

stymaar

7 hours ago

Are coppicing and pollarding used at all to produce timber? I had the impression that it was done only to make firewood, and was cut repeatedly without letting it grow like described in the article.

jamiecurle

3 hours ago

Ben Law in the UK used a sweet chestnut coppice as timbers for his house. Done properly coppicing can not only produce renewable and sustainable timber, but it is one of the only woodland management techniques that has significant positive impact on the ecology of the woodland in which it is practiced.

https://ben-law.co.uk/

WillAdams

6 hours ago

Coppicing is used for lumber for baskets and other weaving techniques, at least in Appalachia.

zer00eyz

2 hours ago

I had first heard of the concept of doing this to trees as it related to the production of arrows...

Dibby053

3 hours ago

Looks more advanced than simple pollarding. I have never seen this kind of straight, tall tree tops in Europe. If it exists I would like to know!

dyauspitr

3 hours ago

It is more intensive and aesthetic but functionally I believe it’s exactly the same.

broken-kebab

7 hours ago

Yes, it's exactly it. But call it 'giant bonsai', and it sounds like a new discovery.

cwillu

7 hours ago

Well, except for the part where it depends on a mutation.

jibal

2 hours ago

It doesn't depend on a mutation.

grey-area

7 hours ago

Yes it is.

ksymph

8 hours ago

The article is pretty light on details. Essentially, the tree is first pruned to create a wide and sturdy base; once that's stable, subsequent shoots from the branches are pruned to grow vertically. The technique relies on this particular variety of cedar which tends to grow vertically but can also be made to spread out a bit. It has some advantages in space-saving and efficiency but it's also very labor-intensive.

wxw

8 hours ago

I don't quite understand -- what is it about this technique that makes the trees grow perfectly straight and why is

> the lumber produced in this method is 140% as flexible as standard cedar and 200% as dense/strong,

rdiddly

7 hours ago

This article is just a rehash or summary. Check out one of the sources it links to (since the other is broken) for details on the technique: https://mymodernmet.com/kitayama-cedar-daisugi/

The strength & flexibility I would guess are attributable to the lack of knots and the straightness of the grain.

One thing both writers keep doing that's annoying is calling it a cedar. The tree is cryptomeria japonica, known as sugi, which in English is sometimes known by various misnomers such as "Japanese cedar" and "Japanese redwood," both of which should be taken as more poetic than scientific.

Fwirt

8 hours ago

It’s exploiting the natural tendency of trees to create “waterspouts” through a technique called pollarding. When a tree suffers an injury it creates a bunch of new twigs that tend to grow straight upwards if the injury is on the upper branches. The waterspouts grow more slowly and so in this species of cedar they develop those desirable properties.

bgnn

5 hours ago

It is actually a type of cypress, not a cedar.

jibal

3 hours ago

They grow straight because they are shoots/suckers, and that's how tree biology works. And they are pruned every two years to prevent knots and side branches.

The lumber is dense/strong because the shoots have a robustness advantage due to being part of a mature tree with all its resources.