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

https://www.openculture.com/2020/10/daisugi.html
47•MaysonL•1h ago
https://x.com/wrathofgnon/status/1250287741247426565, https://xcancel.com/wrathofgnon/status/1250287741247426565

Comments

wxw•1h 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,

?

Fwirt•1h 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.
rdiddly•1h 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.

operation_moose•1h 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?
grey-area•1h ago
Yes it is.
thrownawaysz•1h 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

broken-kebab•1h ago
Yes, it's exactly it. But call it 'giant bonsai', and it sounds like a new discovery.
cwillu•58m ago
Well, except for the part where it depends on a mutation.
cwillu•59m 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

ksymph•1h 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.
gordonhart•1h ago
Interesting technique, horrible article. Manages to convey significantly less information than the X thread it mined for ad revenue.

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

tape_measure•1h ago
https://x.com/wrathofgnon/status/1250287741247426565
•21m ago
rythmshifter•1h ago
An ad or something on this page attempted to load a link in an app I did not have
ChrisArchitect•1h ago
(2020)

Some previous discussions:

2023: https://news.ycombinator.com/item?id=37759366

2021: https://news.ycombinator.com/item?id=26941631

cineticdaffodil•52m ago
Im confused.. wouldnt this be suspect to a weight limit - as the full stem would weigh on the carrying "tree" - especially during wind and storms?
stymaar•43m 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.
WillAdams•24m ago
Coppicing is used for lumber for baskets and other weaving techniques, at least in Appalachia.

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

https://www.openculture.com/2020/10/daisugi.html
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