Customer Reviews

"High quality, well crafted, sturdy product. Excellent customer service and fast shipping. I would recommend this to others with security concerns."

"Very high quality security device; shipping was fast. Easy to install as well. I would buy this again if needed."

"Bought a lot of security spikes from here via Etsy, and the result is great - a secure back yard which looks good too."

"Fantastic high-quality product. Ordered a ton more. Highly recommend if you're looking to secure an area for people or animals."

"These spikes are deceiving because they're so elegant. They are a very effective deterrent; worth the money."

"Beautiful product - great quality."

"The product is very sturdy and well crafted, and it arrived very fast. I will definitely recommend them to my other clients."

"I purchased this Shinobi Gaeshi for my property, and I'm extremely satisfied with the quality and craftsmanship. The design blends seamlessly with my existing fencing while providing excellent security. Installation was straightforward, and the materials feel sturdy and durable. Since installing it, I've noticed a significant decrease in unwanted intrusions. It's not just functional but also aesthetically pleasing. The customer service was also excellent, responding quickly to my inquiries. I highly recommend this product to anyone looking for an effective and stylish security solution. Well worth the investment!"

"High quality, highly recommended! Excellent for home defense and a great deterrent for anyone trying to climb into your yard."

"Excellent service and product, very happy."

"High quality, all of the machining looks great. No bad cuts or holes. Ordered 4 lengths, came packaged nice, no shipping damage. A great deterrent for anything going over my fence line."

"Works great! Helped secure our pool gate from people jumping the fence."

"Great experience with this security spikes company. I wanted security for my perimeter wall but didn't want it to look like a prison. I found these spikes on Etsy and ordered the double edge spikes in black. They arrived surprisingly quick."

"Ordered for my Los Angeles home from this manufacturer direct. These security spikes are incredible sharp and threatening unlike anything found in the United States which are dull and easy to get around. I actually ordered a second time."

"I purchased this stainless steel Shinobi Gaeshi. It's a great quality product (quite sharp) and shipping was prompt."

"Excellent product, fast delivery. Would buy again."

"Extremely satisfied, seller was friendly and attentive and product was top notch and exactly what I wanted."

"I purchased these security spikes for the top of my cedar fence. They work perfectly and are extremely attractive. They are easy to install and sharp deterrents to any unwanted intrusion. I was so pleased with them, I subsequently ordered more for another portion of my property. The owner of the company is very responsive and ships your order immediately. I highly recommend this product."

"The item fully met my expectation, good quality and good looking, I definitely will buy much more."

"Great product -- easy company to do business with. I'd been looking for some time for something short of concertina wire to make it harder to get over the locked wooden gates into our back yard without looking horrible, but found nothing in the US. I wouldn't have thought I needed to go as far as Japan as the source. But, it turned out, the Security Spikes item that was offered was perfect for our needs, and the company very easy to deal with. The spikes I got were easy to install, look reasonably good, and are very sharp. I don't think an intruder will be coming over them. I'd recommend the company highly."

"Outstanding product. Met my expectations and very pleased with product."

"Quality product and beautiful design. Really appreciate the speedy delivery. Very pleased with my purchase."

"Fantastic product and incredible quality. Seller is very professional and timely. I ordered a huge allotment of security spikes and they all arrived perfect. Thank you!"

"Very nice quality. Attractive, and sharp! I'd suggest having the maker make any cuts you need at time of purchase. Will buy from this seller again for sure."

"Quality fabricated spikes received in a very timely manner, well packaged. We cut to size and affixed them to the top of a side entry gate. They prevent would be intruders from climbing over gate and enhance the gates appearance, very strong and really gives up peace of mind. Highly recommend for the provision of security for the top of gates and walls without a huge $ outlay!"

"Great product - looks amazing - easy to install, and I feel super safe - no one is climbing over my back gate! I needed a custom size and was treated to excellent customer service and fast delivery. I highly recommend! I delayed this review but now a year later they also hold up amazingly well."

"Fantastic product. Exactly what I was looking for to prevent someone from climbing over the fence. Easy communication and the spikes arrived super fast. Looks great! Clean and modern. Powder coated grey color! Five Stars for a perfect product. Made in Japan! Unbeatable quality and craftsmanship."

"Sharp as hell!!!!! Amazing craftsmanship! Very good quality fence spikes. Hoping the deter some fools from jumping my fence. Thank you!"

"Seller cut item to length for a small additional fee and shipped promptly. Arrived in a few days via DHL to the East Coast of the USA and the product is great quality, we are very pleased with the purchase. Thank you!"

"Very well made and accurately described by seller."

"Looks good and prevents people climbing my fence!"

"Excellent product for my security fence."

"Good quality exactly as described."

"Perfectly and aesthetically addresses the need and easy to install."

"This is a wonderful and well made product. It provides security, yet looks architecturally appealing. The seller was timely and professional. We're very pleased with the quality of this item."

"We had a group of young foxes visiting our garden every night and damaging the plants, and nothing seemed to keep them out. I attached a few along the fence, and they worked brilliantly! The foxes stopped coming! Easy to install, great design and well crafted, and genuinely effective — highly recommend."

"Definitely the most beautiful anti-climb deterrent available on the market. Impeccably craftsmanship, design, and quality. Razor sharp so I feel safe, yet relatively easy to install. Fantastic experience with seller as well, who is very accommodating and kind."

"Otani Ninja deterrent spikes are very well made and provide us an effective deterrent to intruders on our property. We've used them on fences/gates on two properties and they have worked out extremely well. High quality product!"

"Works great and super easy to install! Would definitely recommend! Made my home feel very safe and they were very sleek looking."

"Exactly what we were looking for our gates."

"As pictured and even better in person. Highly recommend."

"Perfect for home defense on block walls, especially since it's painted and coated to avoid rust. The edges are VERY sharp. Shipping was very quick, less than a week from Japan to Los Angeles. And customer service is nice and responsive."

"Very high quality. I was worried about shipping multiple items, they come stacked and well protected in cardboard container. Seller has excellent communications. Very impressed. We bought about 12 feet of the spikes."

"The quality is excellent, very sharp, appearance is pleasant."

"Okay"

"Perfect"

"Fast delivery but please keep in mind when purchasing this product there's an additional fee. A customs and duties invoice charge WILL BE SENT VIA MAIL from fedex requesting payment. Please keep this in mind when placing order."

"More solid than expected. Very good."

"Sharp, smart and excellent quality. Happy customer!"

"Excellent quality, fast delivery."

"Great quality, VERY sharp. Can't imagine anyone getting past these."

"Perfect. Very sharp and easy to install."

"This is a high quality product that looks elegant and is also a great deterrent. In my neighborhood, I wanted to keep would-be prowlers out, without making my back gate look like a prison wall. Amazing customer service! I special ordered a specific size and was so happy with Kojiro Otani's professionalism. I'm recommending to my neighbors!"

"Excellent quality, pleased with these spike rails. Very quick shipping."

"This is an excellent product made to a high quality and it was super fast delivery. Definitely recommend as security/deterrent."

"I recently installed this Ninja Deterrent on my property, and it has exceeded my expectations. The build quality is exceptional, with durable materials that ensure long-term protection. The installation process was easier than I anticipated, and it fit perfectly with my existing fence. Not only does it enhance security, but it also adds a sophisticated touch to my property. I feel much safer knowing this extra layer of protection is in place. The customer support team was also very helpful throughout the process. I highly recommend this to anyone looking for a reliable security solution!"

"Very high quality. I was worried about shipping multiple items, they come stacked and well protected in cardboard container. Seller has excellent communications. Very impressed. We bought about 12 feet of the spikes."

"Kojiro san made us an excellent pair of Ninja Spike climbing deterrents. Shipping was quick (even all the way to the states) and they were easy to install. Thanks Kojiro san - 10/10"

"Perfect for home defense on block walls, especially since it's painted and coated to avoid rust. The edges are VERY sharp. Shipping was very quick, less than a week from Japan to Los Angeles. And customer service is nice and responsive."

"He is very a nice and responsible seller. The goods quality is excellent. It's really made in Japan."

"Amazing product, very sharp but also elegant for areas like a front block wall. Customer service is top notch. Shipping to the US was quick (1 week)."

"Awesome product for home defense. Excellent quality as expected. Quick shipping from Japan to the USA. Received my order in less than a week."

"High quality item, perfect, very quick delivery."

"The security spikes exceeded my expectations! They not only are very well made, but are actually attractive when installed. The fast service on the order was outstanding. Two of my neighbors are so impressed they are planning on an order."

"Looks so good installed, am ordering more."

"Fast service. Very well made product."

"Great product. Very attractive installed. Fast shipping."

"High-quality product which was dispatched speedily and which reached me quickly, despite having to make it from Japan to the UK. I am a repeat customer and can recommend this seller."

"Spikes were as described. Shipping was fast. The price was good. It was an easy purchase and I recommend the store."

"Well-made and high-quality product sent quickly from Japan."

"Great - recommended seller and product."

"I came back to order more after I received the first batch."

"Perfect for the job at hand."