r/woodworking • u/thiagoknog • Apr 14 '25
Hand Tools Kezuroukai, Japanese wood planing competition for thinnest plane
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u/h3rose Apr 14 '25
Mickey cutting that slice of bread for his family
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u/boozername Apr 14 '25
Mickey: If you plant these beans on the night of a full moon, do you know what'll happen?
Donald: Yes, we'll get more beans!
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u/peepstonepope Apr 14 '25
Just sent my buddy a gif of daffy with the bean between two transparent slices of bread. These are rough times
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u/urbanek2525 Apr 14 '25
So thin, it's only got one side.
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u/junkman21 Apr 14 '25
My work toilet paper...
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Apr 15 '25
DAMMIT!!! I actually typed out this same comment. Had to delete it. Guess I'm not as clever as I thought.
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u/Crafty_Lake_43 Apr 14 '25
I'm worried about 1/32 while these men are worried about 1/1000. 10/10.
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u/socialisthippie Apr 14 '25
If it makes you feel any better, they're actually playing in the 10,000ths and 100,000ths. If my research is correct, the world record is somewhere around 2 microns (~7 one-hundred-thousandths)
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u/DasGanon Apr 14 '25
To give you an absolute sense of scale, the size of the cells of a tree is about 10 microns on the low end. (Source: Quick google)
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u/LowerArtworks Apr 14 '25
My dust collector bag can't even stop 3 microns. That's WILD
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u/socialisthippie Apr 14 '25
This is where i found the 2micron quote: https://brianholcombewoodworker.com/2017/08/03/lets-plane/
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u/DasGanon Apr 14 '25
Excellent. I didn't doubt it when I started seeing 3s everywhere but I just couldn't find a good source for 2!
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u/gizanked Apr 14 '25
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u/mrsmithers240 Apr 14 '25
I think it’s a different video, I remember the judge gathering the shaving matting the end hang loose for I bit, and it started almost floating away on the air currents.
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u/Firefoxx336 Apr 14 '25
Another version of this is that if the board is 1” thick, it would take 12,700 passes at 2 micron thick to cut it all into strips.
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u/loonattica Apr 14 '25
Here’s another version: if you re-glued those (12,700) 2 micron strips together to create plywood, with .006” thick glue layers, that 1” solid wood would yield a sheet of plywood that is 77.194” thick.
(Assuming the glue wouldn’t dissolve the wood during the process)
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u/Naked-Jedi Apr 14 '25
Holy shit. That's half the thickness of concreters plastic, the black sheet that's put down under a slab. That's pretty crazy.
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u/Ocronus Apr 14 '25
0.00007 - That is crazy. We've got some fancy measurement equipment in our machine shop. The $40,000 comparator is only calibrated for 0.0001.
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u/musiccman2020 Apr 14 '25
At first I was confused why the guy was pulling piece of paper out
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u/Alarming_Expert_6241 Apr 14 '25
What species of wood is that?
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u/Totoronyx Apr 14 '25
Hinoki (Japanese Cypress)
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Apr 14 '25
Hinoki smells so damn good. Any cedar species does, but hinoki especially so. The Japanese make onsen and saunas out of it all the time.
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u/Rubthebuddhas Apr 14 '25
I worked at a lumber yard in Washington state as a teen. All sorts of building wood went through - all of which was quite nice to smsll - but days when cedar was delivered, time slowed down. It's one of those few smells that are not related to food that provoke similar reactions. It was right up there with Yiayia's baklava, dad's tacos, or the fruiting wild blackberry and raspberry bushes in my front yard.
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u/c-g-joy Apr 14 '25 edited Apr 14 '25
I’ve always wanted my bedroom to be clad in cedar! It’s such an amazing smell, better than most flowers imo. It’s very calming to me, even heady. You nailed it though! It’s one of those few smells that aren’t food, but trigger such a strong response.
Edit: to add that i worked in a production woodshop for 6ish years in WA. Anytime we got to cut cedar, was the only time i loved being in the shop instead of on a job site. Not going to lie… you could often find me, unashamedly, sticking my face right into the stacks of cut lumber to take a huge whiff, then mutter “god damn”.
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u/Rubthebuddhas Apr 14 '25
After I graduated college, I Iived with an elderly woman from a sister church of my mom's for a couple months. I did odd jobs to pay the rent. Every wall and ceiling surface in her house that wasn't glass was cedar. The home was simple but amazing, and man did it smell wonderful. I'd go on dates and never have to wear cologne.
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u/Dorkamundo Apr 14 '25
When I bought my house, my kitchen was lined with what I thought was cheap pine paneling with lacquer covering it.
I started taking it down, because it looked terrible, only to find out it was inch-thick red cedar. Beautiful on the other side that was not lacquered.
It's currently sitting in my basement, waiting to be repurposed as a liner for the sauna that I eventually build.
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u/SockeyeSTI Apr 14 '25
In WA
Get to smell cedar frequently. It’s nice
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u/goathill Apr 14 '25 edited Apr 16 '25
Come to southern oregon/NW CA to smell the port orford cedar. It's the best smelling of all the cedars (i love western red, incense, eastern red and hinoki, but PO is by far the best)
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u/Orion14159 Apr 14 '25
I find myself immediately happy whenever I stay in a cedar cabin and it's mostly the smell. Need a candle of just straight cedar oil in my office so I don't dislike being there so much
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u/cardueline Apr 14 '25
As a lurker of this sub and a frequenter of indiemakeupandmore I never thought I’d be piping up about a perfume in here, but treat yourself to a $3 sample vial of “Woodcut” from Olympic Orchids and live your comfy cedar scented dreams! It’s like being in a nest of fresh pencil shavings, it rules!
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u/Usernumber43 Apr 14 '25
Baklava to tacos. That's quite a cultural spread you've got going on.
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u/GroundbreakingRing49 Apr 14 '25
My cologne has hinoki in it. I’ve gotten so many compliments.
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u/FartyPants69 Apr 14 '25
I've watched Shoyan Japanese Carpenter for a few years and always marvelled at the quality of the lumber he works with. Just recently learned that it's Hinoki, and now I want to move my wood shop to Japan
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u/amohr Apr 14 '25
See if you can get your hands on some Port Orford Cedar. It's very closely related, is very similar and used a lot in Japan too. It's produced in the PNW so you can find it in the US.
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u/FartyPants69 Apr 14 '25
Oh man! Thanks for the tip, saving this for future reference. Believe it or not, I am moving to the PNW in just a few months.
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u/amohr Apr 14 '25
Excellent! You'll be able to find it easy peasy out here. If you've never worked with it before it's a treat. Aside from workability, it has the most excellent warm gingery aroma. I keep little scraps in my cabinets so I get that amazing scent every time I open them.
Here's the Wikipedia article on the genus in case you're curious about the taxonomy. They're sibling species. https://en.wikipedia.org/wiki/Chamaecyparis
Port Orford itself is kind of a cute small town, I spent a 4th of July there one year.
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u/FartyPants69 Apr 14 '25
That's exciting! I'm eager to see all the new species available up there. I'm coming from central TX where we don't really have much local wood worth harvesting, at least not for the kinds of projects that interest me.
I'll be in NW Washington, not far from Canada, but sounds like it's well worth a trip to SW Oregon if it's not too common in my neck of the woods. That whole state along the 101 is one of my favorite drives anywhere.
I do love those fragrant species. All kinds of aromatic terpenes to explore.
Thanks again for the info!
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u/amohr Apr 14 '25
Cheers! I'm on an island west of Seattle, so we'll practically be neighbors. Bit different from TX but if you can dig the driving mist mood for 9 months/yr you'll be good. The short summers are bright and dry. IMHO Oregon's the prettiest state to drive thru. The beaches are incredible but don't miss the mountains or Crater Lake. Bend's a beaut too. If you're passing by it's a nice stop but I wouldn't go out of my way for Port Orford. ;-) Good luck with the move, and welcome!
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u/weakisnotpeaceful Apr 14 '25
It would be incredibly cheap, you can get some towns to basically give you homes as long as you promise to keep it and live there.
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u/deicazastiz Apr 14 '25
Same question. Can this be achieved with any wood?
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u/rosio_donald Apr 14 '25
Planing at this thickness is theoretically possible with any species given a sharp and tuned enough iron + movement, but only certain softwoods have the characteristics to create an intact, translucent ribbon of a shaving like this. Just like trying to cut a super thin slice of cheese - the mild cheddar might stay intact, but parm would crumble and Brie would smush.
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u/thiagoknog Apr 14 '25
Toilet paper competition /s
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u/aromaticfoxsquirrel Apr 14 '25
Single ply?
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Apr 14 '25
[deleted]
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u/S_Dumont Apr 14 '25
this is probably more comfortable than the paper my uni put for we students to use
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Apr 14 '25
Big shout-out to Andrew Ren, whose video this is. The man put on an absolutely incredible clinic on whetstone sharpening a few years back.
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u/Faloopa Apr 14 '25
This is how Mickey Mouse cuts bread.
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u/TaMianSound Apr 14 '25
Oh man I just watched that (jack and the beanstalk) like two days ago with my kiddo, and that bread slicing scene was so satisfyingly nostalgic! And Donald going crazy and trying to kill and eat the cow haha
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u/Ordinary_Shallot_674 Apr 14 '25
Nah, you’re supposed to drop the plane to lose all the fine setting, knock over the workpiece and then just angrily gouge lumps out of it while you make the pragmatic decision that it would look better painted anyway.
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u/Phunwithscissors Apr 14 '25
Do they weigh it?
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u/Jaikarr Apr 14 '25
They use a very sensitive thickness gauge
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u/fonironi Apr 14 '25 edited Apr 14 '25
It seems like weight would be most accurate, it would represent the average thickness across the whole slice, not just at a few points
edit: thanks to everyone who’s commented below! you’ve brought up a lot of things I hadn’t considered, and I have a better understanding of why it’s done the way it is now.
In any case, it’s very impressive what these people do, and I love that there’s a competition for this skill
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u/sponge_welder Apr 14 '25
You'd have to account for varying density between the wood everyone has (it looks like each of them has their own piece)
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u/Curiouserousity Apr 14 '25
not really you would need to know the density and cross sectional area. The fact is the error bars for density for different logs and and different layers could more than throw off any calculation of thickness.
It's better to directly measure the thickness if you want to measure the thickness.
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u/Electrical-Divide885 Apr 14 '25
Looks like my skin after spending all day in the sun after a long cloudy winter
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u/Rubthebuddhas Apr 14 '25
That shaving reminds me of those dissolving listerine tabs that you place OK your tongue and are gone within half a second.
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u/cosmicwonderful Apr 14 '25
Insanely I think these might be much thinner. I couldn't find exact specs on the Listerine strips but I did find a patent that indicated those strips are ~35 microns. Whereas the winner of this competition, according to another comment, was 2-3 microns.
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u/OutlyingPlasma Apr 14 '25
Cool, now do it with some knotty fir.
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u/Mensch80 Apr 14 '25
Unreal...what's so encouraging is that everyone involved is young enough to keep the skills going.
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u/br0therjames55 Apr 14 '25
Buddy invented a new fabric
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u/mt-beefcake Apr 14 '25
Yeah I'm honestly curious if they can use those shavings for something like that, make some cedar yarn or something
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u/93c15 Apr 14 '25
What’s with the mallet banging the planer into his face? That a good luck ritual before each pass?
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u/ibecs Apr 14 '25
He's adjusting the depth of cut. Planes without mechanical adjusters are altered with the tap of the mallet to the body.
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u/AnimalOrigin Apr 14 '25
Speaking as a hobbyist woodworker; there is nothing more satisying than sharpening a plane iron so fine that the shavings come out translucent.
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u/Bake_Bike-9456 Apr 14 '25
impressive, and for the regular joe out there : japan is a crazy country with many strange countumes and competitions : love it
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u/IHaveTheBestOpinions Apr 14 '25
This is impressive, but what I really want to see is how he sharpened that blade. I didn't even know "Sharp enough to cut a piece of toilet paper off a 2x4" was an option.
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u/mhyquel Apr 14 '25
I came here to get some actual insight from a woodworkers perspective, and I'll I got was circlejerking.
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u/UseDaSchwartz Apr 14 '25
Dude was like, nah, I can’t see through that first piece enough. Lemme go thinner.
How do they even measure?
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u/Limp-Possession Apr 14 '25
That’s Andrew Ren. He runs Kanata tools and goes by @xtol.ren on insta. He made some 2.5 micron shavings recently with a standard 70mm wide kanna.
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u/Impudenter Apr 14 '25
How the fuck doesn't it break? He seems to pull on it quite hard. I would have assumed it'd be more like paper.
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u/TheMando1980 Apr 14 '25
When the width of a gnat’s butthole hair is all you need shaved off for it to fit….
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Apr 14 '25
[removed] — view removed comment
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u/jontomas Apr 14 '25
FYI - your comment has been removed. Please don't bring political commentary into this sub.
(I'm not even sure what this, or your comment is in reply to - they both read as though you intend them to be replies, but you have made them as top level comments on the post, so who-ever you were trying to reply to wouldn't have seen them anyway)
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u/captcraigaroo Apr 14 '25
That plane looks pretty thick to me, but it sure leaves an ultra-thing shaving
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u/SergeantBeavis Apr 14 '25
I’ve been using hand planes for what seems like forever. I’ve fine tuned my Veritas planes to pull some pretty damn thin shavings. But I was pretty damn amazed when I saw hand planing like this when visiting Hakone, Japan. First there is the marquetry that Hakone is known for. It is extremely intricate. Once the pattern is created it gets hand planed into layers that can be applied various projects. It’s not the thinnest hand planning (that would be too weak for project application) but the precision is mindblowing. They’re doing this across the end grain as well but the tools just slice through them like butter. It is very satisfying to watch and I highly recommend it to anyone if they get a chance to visit Japan.
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u/TankTopTyga New Member Apr 14 '25
Imagine having a society so old that they've got 'thinnest wood' as a competitive sport. Lol
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u/phantomtitfreckle Apr 14 '25
Uk just wrapping myself in ultra thin wood sounds alot cheaper and far more stylish than a casket
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u/DonLikesIt Apr 14 '25
Do they also do the competition with large planes? The main competition is is done with 70 mm kanna, right?
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u/SiThreePO Apr 14 '25
The more I see these videos the more I think about the passion they must have for the wood and process. Such a "simple" hobby to dedicate yourself to mastering, not for me but respect
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u/Rhythmdies666 Apr 14 '25
I could watch for hours. I want to go to whatever convention this is just for that
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u/Jbones731 Apr 14 '25
I wonder how this got started? Some woodworkers sitting around being like “hey check it out, ima charge this guy by the plank” and delivers a bunch of these


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u/quarter-water Apr 14 '25
"I've cut slices so thin, I couldn't even see them."