FAQ
Frequently Asked Questions
Brand
Who makes Ninja Deterrent™?
Ninja Deterrent™ is a brand of architectural anti-climb security spikes (shinobi-gaeshi) designed and manufactured in Japan by Saitani-Ya Co., Ltd. under the name Otani Ninja Deterrent. Genuine products are sold on this official website (ninja-deterrent.jp) and through our official storefronts, such as our Etsy shop “OtaniNinjaDeterrent”.
Is Ninja Deterrent related to the “NINJA” counter-drone (C-sUAS) system?
No. Otani Ninja Deterrent is not affiliated with any drone-countermeasure or counter-UAS products. We exclusively design and manufacture architectural anti-climb security spikes for walls, fences, and gates.
How can I tell genuine Otani Ninja Deterrent products from similarly named items?
Genuine Ninja Deterrent products are made in Japan by Saitani-Ya Co., Ltd. and carry the Otani Ninja Deterrent brand. Products sold under similar names by other sellers are not ours. If you are unsure whether a listing is genuine, please contact us and we will confirm it.
Products
What is Ninja Deterrent™ made of?
We use high-quality stainless steel SUS304 and structural steel SS400. Please refer to each product page for more details.
Is it purely decorative or functional?
They have a design that harmonizes with the building’s appearance and also provide an actual deterrent effect. There is data showing that the likelihood of damage triples without a security system.
Can it be installed on fences, walls, or gates?
Yes, it can be installed on all those surfaces. Please prepare the appropriate fasteners according to the mounting structure.
Order
How can I place an order?
You can order directly from our website or contact us via the inquiry form or through our various social media channels.
Can I customize the size or finish?
Yes, custom options are available. If you can share the drawing information and other details, we can also make suggestions from our side.
Shipping
Where do you ship to?
We cover the United States, the United Kingdom, Australia, Canada, and more. Please feel free to contact us.
How long does shipping take?
It usually takes 5–10 business days.
Can I track my shipment?
Yes, tracking information will be provided with all orders.
Tax & Duties
Are taxes included in the price?
No, taxes are calculated at checkout.
Who is responsible for import duties?
Customers are responsible for any import duties.
Can you declare a lower value for customs?
No, we must declare the full value by law.
Is your product HS code available for pre-clearance?
Yes, we can provide it upon request.
Contact us
Questions?
For general inquiries about our products or consultation regarding installation, please contact us.
Book a meeting?
Schedule a free online consultation with our team. Pick a time that works for you — available slots are shown in your local time zone.