Otani Ninja Deterrent™

We are a supplier of high quality security spikes "Ninja Deterrent™" for residential and commercial applications. We started at 1930 as a Hardware manufacturing industry in Osaka, Japan. The metal fittings were mainly used in bespoke rain gutter brackets for Japanese Important Cultural Architecture such as Shrines “神社” and Temples “仏閣”. And in Japan, security spikes are called "Shinobi Gaeshi 忍び返し", which means literally “Ninja Deterrent™” in Japanese. The origin of "Shinobi Gaeshi" dates back to the era of Ninjas ”忍”. These spikes were used to prevent Ninjas from entering buildings and attacking the occupants. More recently, Shinobi Gaeshi are used to secure homes and facilities from unwanted intruders particularly in the high-end home market. Additionally, they also have been installed as barriers to prevent animals from entering properties and from birds from perching on screen walls or security fences. Our high quality, durable, and well designed "Ninja Deterrant™" helps prevent any unwanted intruders such as thiefs, cats, birds, and the occasional Ninja "忍".