SKU: 36857615474

Kogetsu / Goko Hamono Shirogami #1 Nashiji 165mm Santoku

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Description

Kogetsu / Goko Hamono Shirogami #1 Nashiji 165mm SantokuHandcrafted by Yoshito Yamakawa, this Santoku features a Shirogami #1 steel core, clad in stainless steel with an elegant Nashiji finish. The blade is heat treated to 62 63 HRC, which ensures pretty good edge retention; and the fit and finish is decent for its price. Measuring just 2. 8mm at heel and 1. 8mm in the middle of the blade, the exceptionally thin behind the edge and the beautiful distal tapering allows the knife to deliver a smooth cutting

Handcrafted by Yoshito Yamakawa, this Santoku features a Shirogami #1 steel core, clad in stainless steel with an elegant Nashiji finish. The blade is heat-treated to 62-63 HRC, which ensures pretty good edge retention; and the fit and finish is decent for its price. Measuring just 2.8mm at heel and 1.8mm in the middle of the blade, the exceptionally thin behind-the-edge and the beautiful distal tapering allows the knife to deliver a smooth cutting performance. The blade is paired with an octagonal wa-handle that's made with wenge wood with a buffalo horn kuchiwa.

Spec:

  • Origin (Made in): Kashiwa, Chiba Prefecture, Japan
  • Brand: Goko Hamono
  • Craftsman: Yoshito Yamakawa (八間川 義人) aka Kogetsu
  • Knife Type: Santoku
  • Blade
    • Construction: San Mai
    • Grind: Double-edged Blade (50/50 Grind)
    • Hagane (Core Steel): Shirogami #1 (White #1)
    • Jigane (Cladding): Stainless Steel
    • Hardness: 62-63 HRC
    • Hand-forged, hand-grinded, hand-sharpened
  • Blade Finishes: Nashiji
  • Blade Length: 165mm (6.5")
  • Blade Height (at heel): 51mm
  • Spine Thickness
    • Above heel: 2.8mm
    • Middle: 1.8mm
  • Handle
    • Shape: Hachikaku (Octagonal)
    • Material: Wenge
    • Kuchiwa: Buffalo Horn
    • Length: 128mm
  • Overall Length: 306mm
  • Weight: 127g (4.48oz)
  • Engraved Mark (Front): In Japanese Kanji "Shimosa Province Kogetsu Made" (下総国 光月作)
  • Engraved Mark (Back): In Japanese Kanji "Shirogami #1" (白紙一号)

About Goko Hamono 五香刃物

Gokou Hamono is a tiny knife making workshop located in Kashiwa City, Chiba Prefecture that is run by Norihiko Yamakawa (八間川憲彦) and Yoshito Yamakawa (八間川義人), the father and son team. Norihiko Yamakawa (the father) first founded Gokou Hamono in 1990 as a cutley wholesaler, before turning it into a knife making workshop in 1995 with the help from blacksmith Moriei Seki (関守永). Yoshito Yamakawa (the son), a high school student at that time, shadowed his father and eventually became a blacksmith himself. “Telling no lies” and “Dedication” are Gokou Hamono’s philosophy. The father and son team would not call themselves “masters”, because they think one will always have room to improve, and self-pride would hinder self-reflection. As a result, Gokou Hamono’s knives can only get better and better in the future.  Only knives made by Yamakawa-san are engraved Kogetsu Made ( 光月作)

Care:

Shirogami #1 (white #1) steel is one of the popular types of high carbon steel found in Japanese kitchen knives (Wa Knives). It is not stainless, therefore you must wipe your knife dry after each use, in particular the core steel not covered by the stainless cladding. Patina will develop over time, which will appear as “discoloration” on the cutting edge, but that is the nature of carbon steel - not a defect. The stainless cladding covers a large part of the blade, making maintenance easier but still preserving the cutting and sharpening pleasure of the Shirogami core. Avoid cutting into bones, frozen foods, hard fruit pits.

Cutting Surface:

Recommended cutting surface: wood, rubberized boards and high-end composites, and quality plastics such as polyethylene make acceptable cutting surfaces, and will help protect and prolong knife’s edge. AVOID glass, metal, countertops, and other rigid, non-forgiving surfaces.

Sharpening:

We recommend sharpening all quality Japanese knives on whetstones, as we believe they yield the best results for your knives.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 36857615474

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4.7 ★★★★★
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Verified Purchase
Tyi Campbell
West Palm Beach, US
★★★★★ 5
Great product and worth the money.
Size: 4 Panel-88'', Color: Black
Portable and stable. Perfect size and gives me the privacy I need when working from home. Stability is great as long as you place the stands correctly it won't wobble. I love it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
M
Verified Purchase
Mona T.
Bozeman, US
★★★★★ 5
Attractive
Size: 4 Panel-88'', Color: Grey
The assembled product is just as described. The screens look great! I am using them to hide the cluttered shelving in my garage. The area now looks quite neat Something I must say, though, is that the assembly was extremely difficult. I had to use a silicone spray and some pounding to get the A and B poles to fit together. Also, it required a great deal of strength to stretch and hold the fabric panels so that the bars inserted in each hem lines up with the screws inserted in A/B poles. I strongly recommend having a partner to help with the assembly. while sc and screw into poles them once inserted intetchedtne end of each pole ( and B poles barely fit together. I used silicone spray on the end and then pounded them
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 12, 2025
K
Verified Purchase
karine
Whiting, US
★★★★★ 5
Works
Size: 3 Panel-102'', Color: Beige, Size: 3 Panel-102'', Color: Beige
It’s beige and not white. Once install - hard to disinstall. Need a drill to put it together
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Reviewed in the United States on May 4, 2026
R
Verified Purchase
ralversity
Phoenix, US
★★★★★ 3
Does the job, but assembling by yourself is a nightmare
Size: 4 Panel-88'', Color: Black
Does it do the job? Yes, although as others said there are small gaps but it's not a huge deal. The price is also good. But the reason I'm giving it a 3/5 is simply because the assembly for this was a complete nightmare. I honestly don't think I would recommend this to anyone unless they have another person to help them assemble it, because doing it by myself was terrible. I don't think I'd buy this again, I think I'd opt to just spend a bit more money and save myself the trouble personally.
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Reviewed in the United States on May 29, 2026
T
Verified Purchase
Talagand
Lake Worth, US
★★★★★ 4
Reasonably adequate room divider
Size: 4 Panel-88'', Color: Beige
I'm reviewing this as I assemble it. Couple things: 1. I didn't expect as much assembly. I've ordered dividers before and they more-or-less came as one unit. Sometimes the panels needed screwing together. These require complete assembly and come largely as three rods: two make up vertical columns and snap together. Another one (called part "C") makes the horizontal columns and you have two of these per panel (one attaches to part "A" and the other part "B"). These parts are metal with a plastic shim. Using the wood screws to attach to part "C" is a real pain in the neck. There's not much holding the panel in place so it's a little tricky. One tactic I've found while I'm assembling that works for the initial connections from parts A and B to their respective "C" rods is to hold the screw in place with a screw driver and then rotating the rod around the screw. This will do a number on your hands if you aren't wearing gloves. This obviously doesn't work when completing the connection. Using a driller driver on this is really near impossible because there isn't anything you can use to secure it in place. You can use it on the first panel, but as it gets longer, it becomes increasingly difficult and because it isn't wood, it's really tight. I considered drilling larger pilot holes but since there are only 4x4=16 screws I need to screw in, I just decided to use my screw driver to complete it. 2. Also related to assembly. When completing the panels (attaching parts "A" and "B" to parts "C" that have the cloth cover on it), you have to be careful that when you tighten that side that it isn't loosening the other side. Because the pilot holes are so tight, you can end up rotating the rod, which rotates it in the same direction as looser on the original side. Having someone hold the "C" rod in place while you screw it in is probably the easiest approach. I didn't have a 2nd person, so I just had to keep flipping back and forth and tightening both sides as I screwed it in. Not the worlds biggest deal, but annoying nonetheless. 3. The way the instructions are written, they seem to suggest building this thing progressively; that is, you do panel 1, then 2, connect them together, then do 3 and connect it, etc. I took a different route that I suspect saved me quite a bit of trouble, and I assembled all four panels first and THEN connected everything together. 4. For the love of God make sure you check that the plastic tip is on the same side for every panel. Otherwise, you have to take one side apart again and reverse it. On the bright side, if this happens, you've essentially bored out the pilot holes to be the correct size... which is having me question if I shouldn't have just bored them out to the appropriate width in the first place. 5. Attaching all of the panels together is also an enormous pain in the ass unless you happen to have an 88" long elevated surface. Attaching the legs either requires you to elevate one side, which will invariably twist the inexplicably cheap material in the bottom connectors... or you can attach them sideways... or you can put this thing upright, having two people hold the panels in place while you use the allen wrench to tighten the bolts on the underside. None of those are particularly great options. NOW on to the utility itself. 1. The panels do let some light through (I didn't believe their advertising, and that was one of the reasons that I bought beige, is that I wanted it to not be too dark). They aren't transparent though, so it isn't that far off from their description. They functionally work great, and keep the mess of wires hidden and when I'm sitting at my desk, actually reflect quite a bit of light into my office. Great! 2. My wife has described these as "the most hideous piece of furniture ever conceived of by man." So it does not have spouse approval factor. Granted, she will seldom be in my office area, so that isn't the end of the world. 3. These are really hard to align in a way that doesn't look a little tacky. There are some plastic connectors but they don't do a bang up job of keeping these in place. Each panel is slightly tilted and it's... quite obvious. I may at some point make my own improvements to these to help make them more level. It's not a particularly expensive product so I wasn't expecting much so it's fine and I'm not going to ding them on the rating because of it. All said, would I buy this product again? Probably not. It's assembly was ~90 minutes which is about 75 minutes longer than I was anticipating spending on this (not including the 5 minute writeup that I'm doing here). But am I going to return it? Also no, if for no other reason I'd be just as annoyed taking it apart and putting it in the original box to return it.
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Reviewed in the United States on October 31, 2023

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