Key Points To Start Rough Surface Sharpening, What A Professional Sharpener Looks For | 和包丁の荒研ぎをする前に

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Part 2
• Flat to Convex and Fin...
Part 3
• On the way to a kasumi...
Hi, Continuing on from the previous video, this video is about a question that was previously asked in the comments section of the video.　(Thanks for all the great comments and requests!)
When doing surface sharpening, what am I looking for when moving on to the next sharpening stone? After talking with my partner Yuka about how to explain this, we decided to make a series of videos on the process of completing the sharpening of one kitchen knife, Naoki Mazaki's Kurouchi Gyuto.
The more you get into the fascination of Japanese kitchen knives, the more you will see the details. And what would I, Ivan, be looking at when sharpening kitchen knives myself? I hope this video will be helpful for your surface sharpening.
In this video, I will explain before I start sharpening and sharpen with NSK Kogyo Oboro Knife 200. Since this is a series, we will post videos up to the point of finishing with a natural sharpening stone, so don't forget to subscribe us so you don't miss it!
In the previous video, I talked about what I check for when edge sharpening and moving on to the next stone. If you haven't watched it yet, please go check it out!
Previous Video👇
• How Professional Sharp...
包丁研ぎ歴25年、現在は日本三代包丁産地である大阪府堺市で包丁会社に勤めているカナダ人です。
今回は研ぎ師の本業である、包丁研ぎを一からご説明いたします。
実は包丁研ぎを始める際、砥石で研ぐ前に確認すべきこと、やることがいくつかあります。また今回はNSK工業のダイヤモンド砥石の朧包丁２００番を使った研ぎの後、どのような点をチェックしているのかも研ぎ師視点でお話ししています。
今回の研ぎでは、眞崎直樹氏の黒打牛刀を使わせていただきました。貴重な包丁を研がせていただく機会をいただいた、包丁コレクターの友人には感謝しております。
[ Previous Recommended Videos ]
🌟Who is Ivan?
• My 25 Years of Hand Sh...
🌟My Sharpening Work - Kurouchi Gyuto Sharpening from Blacksmith until Natural Stone Sharpening by Ivan
• Natural Stone Polishin...
🌟My Sharpening Stone - NSK Kogyo Diamond Stone
• An Introduction to NSK...
🏠NSK Kogyo Diamond Sharpening Stone - Komon
komonjapan.com/collections/ns...
Hello, we, Ivan and Yuka have a unique experience of Japan through our business and life such as rich Japanese culture, exquisite crafts, breathtaking natural landscapes, beautiful foods and exciting travel, we share what we feel through our business and our lives. By sharing such our experiences, we hope that you will enjoy through our videos!
00:00 - OP
00:16 - Surface Sharpening & Polishing
01:19 - Mazaki's Kurochi Gyuto
01:35 - Overview About This Video
02:39 - Check The Blade Details
04:24 - Check Key Points on Blade in Order to Start Rough Sharpening
09:03 - Straighten and Shape the Blade
11:59 - Corrected! Ready to Start Sharpening Now
13:29 - Sharpening - Oboro Knife 200 Grit
18:19 - What I Look for at the End of Sharpening on 200 Grit
20:42 - Convex (Hamaguri) Shaping

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27 июн 2024

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Комментарии : 37

@bolaroberts 2 месяца назад

Thanks a lot to share your knowledge! Waiting for the next video.

@SC-wi9md 29 дней назад

Already a great knife, but imagine how much it has been improved.

@Nickporter17 2 месяца назад

Great video

@mountainwolf1 Месяц назад

I'am actually forging a gyuto currently so these little details are very useful for me. Thank you very much for sharing your wisdom with us all godbless and good health.

@92boostedh22 Месяц назад

Can’t wait for the next step!

@ivanyuka-japan Месяц назад

We are just shooting it now. Try to upload next weekend!

@sonkekoster3105 2 месяца назад

Great thank you - that's what I like!

@Yupppi 2 месяца назад

I'd love to hear more about fixing geometry etc. Most youtube sharpening focuses on exactly that: sharpening. But Ivan does the whole process, starts from reviewing the blade in general, is it bent, how does it fare when rocked on a flat surface. A lot of people in my opinion can understand making the triangle point by sharpening, but how about recognizing and fixing things like when Ivan fixed the knife on the five part video series with thicker and thinner parts and straightening it. I wonder how complicated it is to straighten a blade that's bent and uneven in multiple ways? Like bending one in shape probably changes the context for those other deviations. And how does it differ from when you for example sharpen the edge asymmetrically by accident and it goes into S-shape, as compared to the whole blade being off in some way? How do you work the knife with your mind focused on it when it has these other issues like having to remove parts of the bigger bevel. Like avoiding making it worse in some way, but in fact beautifully even. I assume this whole preparation makes a big difference in how the knife performs, compared to even if you were a great sharpener and didn't do the preparation. I believe those being more about technique while understanding where the geometry actually is and where do you want it to be, is it correct? I notice this video already addresses quite a bit of that process of recognizing what's going on with the blade and how to do it. Great videography in terms of getting some of the sights to show up for the viewer. Helps understanding how it looks like. I also really enjoy Ivan's calm and coherent narration. I'd gladly listen to long format like 30-60 minutes of him explaining some important pointers that come from professional experience, sipping my morning coffee. The sound effect for notes when he looks at the blade, I was thinking he rubbed the mic every time until it happened consistently enough. Watching him bend the knife made me realize just pulling a cheap knife from a block rack probably bends the blade slightly out of shape already. Very much looking forward to the next videos. Also would be happy to hear an initial analysis tied to what issues and operations would relate to which part of the process. Obviously you don't fix everything at the same time.

@matija.k 2 месяца назад

Thanks for your content. Really helpful. Big fan.

@ivanyuka-japan 2 месяца назад

Thank you!

@wrtlprmpft2 2 месяца назад

Very useful vide, thank you. Already the scratch pattern of the 200 grit stone looks very decorative.

@paweel2494 2 месяца назад

Thank You very much. This is exactly the kind of video I need. I love watching you at work. Yesterday I finished watching a series of 5 videos about polishing a knife for the second time. Greetings from Poland.

@sharpfactory3705 2 месяца назад

Nice video, i just finished grinding a Nata today. I think some content about these tools from you would be great

@ivanyuka-japan 2 месяца назад

Thanks actually we are planning to sharpen a Nata next time we find one in the Kyoto antique Market

@katranh 2 месяца назад

Thank You very much for sharing of Your working skill and process! Looking forward to another videos.

@dmitrybelyakov 2 месяца назад

ah! i was so looking forward to the rest of it!

@EXTREMERDEAD 2 месяца назад

love your videos, you do a amazing work could you do a video teaching how to shape, angles and everything

@ivanyuka-japan 2 месяца назад

Your support means a lot, thank you! It’s awesome to hear you're enjoying the videos. I'll work on putting together a comprehensive video on that topic.

@WormyLeWorm Месяц назад

It's really nice to see this. I'd love to see some more insight about identifying the shape of the grind of the bevels and how to restore them after doing a thinning process, just like how the hamaguri was identified in this video. You can find a lot of information about thinning and it being something to do on the internet now, but not often the precise dialing in of the shape of the bevels and how to see and work them to get cutting feel you want or match the bevels that were initially there from the maker. It's a bit difficult to figure out.

@ivanyuka-japan Месяц назад

Thank you, yes this is very important and part of my daily work, we will take not of this and include it into upcoming content.

@DS-pb1hh 2 месяца назад

Great insight! Thanks a lot!

@olivierl9523 2 месяца назад

Hi Ivan and Yuka, it's always nice to watch your videos. Can't wait to see the next one as I have yanagiba hamaguri waiting for some work.

@AlexPedersen123 2 месяца назад

Great video looking forward to next one!

@Haganeaffutage 2 месяца назад

Thanks to share Ivan

@naturalwhetstone8100 Месяц назад

Hello mr 🙏 Maybe interested in Indonesian natural Whetstone?

@dgpdgpdgp 2 месяца назад

loving the videos!

@gridplay 2 месяца назад

Superb contents 🎉🎉🎉

@Sharp.Penguin00 2 месяца назад

Great content! If possible, could you please do a video on burr removal? I really struggle with that part of sharpening. I have a great, really sharp edge when I get lucky and remove the burr but usually can't seem to remove the burr unless I raise my angle for a couple of passes. Thank you kindly

@ivanyuka-japan 2 месяца назад

Thank you for your feedback and suggestion! Burr removal can indeed be a tricky aspect of sharpening. I'll definitely consider creating a video focused on this topic to provide some guidance and tips. Stay tuned for future content, and I'll do my best to address your question thoroughly!

@Sharp.Penguin00 2 месяца назад

@@ivanyuka-japan thank you so much! Great channel! I've been living every video!

@danielparker7544 23 дня назад

Would it be possible to describe the two steps you take to prepare the Oboro Knife 200 Grit stone, starting at 13:50? It looks like you use two materials to scrub the top of the stone.

@ivanyuka-japan 23 дня назад

We use NSK Kogyo’s 200 grit flatter for flatten the surface, and to make more aggressive textures use 120 grit rough stone, both you can check Komon’s website This video down below would help answering your questions individually, we shot both of the process Basic Tip of How to Use OBORO KNIFE - NSK Kogyo ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-b9ShvSxELrE.htmlsi=ogmNTXat1NQT-qNO

@kristofferjrgensen696 23 дня назад

How do you correct for unevenness in the blade thickness. Where you grind through the edge at one point, but have more thickness before or after, lengthwise?

@ivanyuka-japan 17 дней назад

This is fairly complicated to explain in txt but after I get the blade straightened the main work is then to even out high and low spots in this case the blade road, I start with the high spots first working outwards, at the same time I will correct the edge geometry and establish a microbevel to gauge the thickness and evenness across the area of the blade about 1cm behind the edge, when all the problem spots are correct then I start blending the entire blade road together, all this being done on a 120 and 200 grit stone. After I check for an even and consistent blade road using light and a straight edge and digital caliper I’ll either continue on with blending or move on to the next grit 400 Hope that helped to answer but it’s probably something only understood in person

@T_chanell 2 месяца назад

Saya mengikutimu sejak subscribemu masih 400an dan sekarang sudah diatas 1000 subscribe, kualitas dan substansi video anda yang bermanfaat memang pantas mendapatkannya. Selamat Ivan, saya ikut senang, semoga sukses selalu

@ivanyuka-japan 2 месяца назад

Thank you so much !!