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Description
Utsurimono Japanese Koi Carp Cyprinus CarpioUtsurimono Japanese Koi Carp Cyprinus Carpio Shiro Utsuri (SHEE roh OOT soo ree) koi have a sumi (black) body with a shiro (white) pattern over the top. The pattern of a Shiro Utsuri koi is often described as a checkerboard with its alternating sections of sumi and shiro. The variety is quite a simple variety compared to, say, a Goshiki but its simplicity is often one of the main attractions. The sumi and shiro provide a beautiful and dramatic
Utsurimono Japanese Koi Carp Cyprinus CarpioShiro Utsuri (SHEE-roh OOT-soo-ree) koi have a sumi (black) body with a shiro (white) pattern over the top. The pattern of a Shiro Utsuri koi is often described as a checkerboard with its alternating sections of sumi and shiro. The variety is quite a simple variety compared to, say, a Goshiki but its simplicity is often one of the main attractions. The sumi and shiro provide a beautiful and dramatic contrast that always stands out and is often visible from quite a distance!
The first Shiro Utsuri koi were bred in the late 1920s, but it is unknown exactly how they were bred and what they were bred from. The most common theory involves the Shiro Bekko koi variety which is a white koi with black patterns as this is the reverse of a Shiro Utsuri koi, which is a black koi with white patterns. However, this is just a theory, and the truth is, and likely always will be, completely unknown! All we do know is that the Shiro Utsuri was first shown to the koi keeping hobby in 1931 and very quickly became a very popular variety with a massively high demand for the variety.
Due to this popularity of the Shiro Utsuri koi and its relative easiness to breed in comparison to the Ki Utsuri and the Hi Utsuri, many breeders have invested a lot of time and effort into refining and improving the Shiro Utsuri variety. Ever since the first generations of Shiro Utsuri koi, breeders have been working to develop and perfect the Shiro Utsuri by improving the quality of the pattern and the colours. Unlike the Hi Utsuri and the Ki Utsuri, a Shiro Utsuri koi can be bred from two Shiro Utsuri parents (breeding two Hi Utsuri or two Ki Utsuri koi results in very poor quality, muddy-looking koi without any of the beautiful Utsuri patterns). Therefore, selective breeding can be used to improve the general quality of this variety. This process involves taking the two nicest parent koi and breeding them to create fry who are generally of equal quality to the parent koi. Some of these fry will be of worse quality than the parents and others will be of higher quality than the parents and these higher quality koi are then chosen to be bred together to create the next generation. This results in each generation being generally higher quality than the previous, thus slowly improving the variety.
These improvements have meant that Shiro Utsuri have become a very competitive koi, often receiving titles and awards at koi shows ever since 1991 when the variety was first entered. In Japan, koi shows are often held indoors, and this means that Shiro Utsuri koi do particularly well because the artificial lighting really makes the contrast of the sumi and shiro colours stand out. However, the Shiro Utsuri were never considered for the biggest prizes or the championship titles because they had one major disadvantage compared to the Gosanke koi and that was size. The Shiro Utsuri is quite a small variety compared to Gosanke and Chagoi koi, with the koi often reaching no more than 90cm in length.
By selectively breeding for size as well as quality, the Omosako koi farm was able to produce the first Shiro Utsuri over 100cm. In fact, this koi then went on to win the championship title at the All-Japan Koi Show in 2013 and became the first Champion Shiro Utsuri. Since then, Omosako have had a very strong presence at koi shows with Shiro Utsuri and are considered to be the best breeder of Shiro Utsuri koi in the world.
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4.7 ★★★★★
Based on 2098 reviews
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Product Reviews
★★★★★ 5
Extremely durable, dogs love them
Color: 2 PC-Beef-Red, Color: 2 PC-Beef-Red
I was looking for the toughest and most durable dog chew bone I could find and this is it. I have bought multiple other brands that claim to be very durable and tough for a very long time and this is the one for sure. The shower has described this phone accurately and it truly does last. I purchased this bone about 2 months ago. As you see from the photos attached, this is a very well made chew bone and my aggressive pitbulls can't tear it apart do they try. They never get tired of it and chewing it every single day for hours on and keeping them very occupied. I have two bones and three pitbulls that chew on it every day. It is so adorable and has an awesome flavor to it which I think entices them even more to want to chew on it. The durability and Lasting power is amazing to me with these tough chewers. I highly recommend this product to everyone out there. I will say only one negative and that is that the middle wraparound piece they were able to pull off but that is not a big deal because there is plenty of bone which was under that cover in the middle of the bone. There's a few mauled chips missing from the ends but the life of this bone is obviously going to be a long time which really surprised me. Give it a shot if you have heavy duty chewers and you will find how awesome this phone really is and it's durability and strength our second to none in my opinion.
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Reviewed in the United States on September 5, 2025
★★★★★ 5
My dog loves it.
Color: 1 PC-Beef-Red
My dog is a super aggressive chewer when it comes to toys. Anything that is soft he rips apart. This one has a wonderful squeaky sound that makes him happy and he enjoys the smell of it. This is a very strong material and definitely worth the price.
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Reviewed in the United States on May 10, 2026
★★★★★ 4
Durable!
Color: 1 PC-Beef-Red
Alright, here's a product review for those Tough Dog Toys:
Finally, a Toy That Survives My Monster! - Tough Dog Toys Review
As the owner of a determined (and I mean determined) large breed chewer, finding toys that last longer than five minutes has been a constant and often frustrating quest. I've gone through countless plush toys ripped to shreds, rubber toys with chunks missing, and even some "indestructible" toys that met their demise far too quickly. That's why I was both hopeful and skeptical when I came across the Tough Dog Toys, designed specifically for aggressive chewers and large breeds.
Let me tell you, these bone-shaped nylon toys are living up to their name. My power-chewing Labrador has been going at this thing for days now, and I'm genuinely impressed. Where other toys have succumbed to his relentless gnawing, the Tough Dog Toy has held its own. There are some minor teeth marks, as expected, but absolutely no significant damage, no pieces torn off, and no signs of imminent destruction. "Almost indestructible" might actually be an understatement!
The design is simple but effective. The solid nylon construction feels incredibly durable, and the bone shape is easy for my dog to grip and maneuver. It's also a good size for a large breed – substantial enough that he can really get a good chew going without it disappearing in his mouth.
What I appreciate most is the peace of mind this toy provides. I no longer have to constantly supervise playtime, fearing that he'll ingest pieces of a destroyed toy. This feels like a safe and long-lasting option for even the most enthusiastic chewers.
Pros:
* Truly durable – stands up to aggressive chewing from a large breed.
* Solid nylon construction feels virtually indestructible.
* Safe design with no small parts to break off.
* Good size and shape for large dogs to grip and enjoy.
* Provides long-lasting entertainment.
Cons:
* May show some teeth marks over time (though this hasn't compromised its integrity).
* It's a fairly hard material, so dogs who prefer softer toys might not be as interested.
Overall:
If you're at your wit's end trying to find a toy that can withstand your aggressive chewing large breed dog, I highly recommend giving the Tough Dog Toys a try. This bone toy has proven to be the most durable option we've encountered, offering excellent value for money and, most importantly, a safe and engaging chewing experience for your furry friend. Five out of five paws!
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Reviewed in the United States on May 16, 2026
★★★★★ 5
Very well made chew bone!
Color: 1 PC-Beef-Red
Great durable, very well made chew bone! Our dog usually tears up all his toys within a few minutes or sometimes hours after he gets them. He’s had this bone for a few days and it’s still in one piece. Except for the rubber that’s in the middle, he chewed up in a couple of days. I would definitely buy more chew toys made by this company! Well worth the money!
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Reviewed in the United States on May 30, 2026
★★★★★ 3
The rubber middle is not durable, it lasted less than 3 hours.
Color: 1 PC-Beef-Red
I bought this as I have bully/husky puppies (9 months old) and a pitt/doberman (9 years old). They are heavy chewers and destroy everything. I saw a video of this toy. The woman said that her dog chewed on it for a while (about 2 hours or so) she showed the ends visibly chewed, which I expect but it was holding up. The rubber middle seemed to hold up to. I received this yesterday. I had to take it away from them last night as they were chewing the rubber middle off. They had it maybe 3 hours. I didn't give it a lower star score as I will just cut the rubber off and give it back to them. So I was disappointed in the rubber middle not being more durable but the hard plastic it's made from is the strong material they need.
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Reviewed in the United States on May 16, 2026