Feb 25, 2026
Wall | Hollywood | Los Angeles
Continuous anti-climb spike installation on a perimeter wall near W Sunset Blvd in Hollywood, Los Angeles, maintaining a clean architectural look while securing the property.
Anti-climb security spikes installed at a cafe entrance on Battery St in San Francisco, blending security with urban aesthetics.
Cafe Entrance | Battery St | San Francisco
Upgrading a brick and steel entrance with Classic Ninja Deterrent™ spikes. Realizing uncompromising perimeter security while making the most of timeless building materials.
Concept: Brick x Steel Contrast
A composition that combines the historical warmth of bricks with the industrial precision of steel frame. As a finishing touch, Ninja Deterrent™ spikes were introduced, not only to make the entrance look "stylish" but also ensuring reliable protection against intrusions.
Classic brick, steel frame are subtly reinforced by Ninja Deterrent™.
Fusion of Security and Design
Ninja Deterrent™ spikes are installed in a seamless line on the beam, providing an effective deterrent against intrusion from above. Thanks to the low-profile design, the spikes visually blend into the architecture while still exhibiting the performance of Ninja Deterrent™ which has been proven in high-end residential and commercial projects.
Ninja Deterrent™ anti-climb spikes continuously protect the upper section.
Natural integration with steel joints in a flush finish.
Night lighting and Ninja Deterrent™ deterrence work together to enhance peace of mind.
Adding "Warmth" with Greenery
Plants soften the industrial hardness of brick and steel. The greenery creates a sense of welcome for visitors, while Ninja Deterrent™ ensures invisible strength above. Maintaining an atmosphere of safety and security
Spikes aligned with the shape of the fire escape to provide complete coverage.
Key points
- Steel Frame: Finished in matte black for a modern, sharp look.
- Ninja Deterrent™ Spikes: Installed continuously in a low-profile on the beam to reliably prevent any climbing/scaling.
- Integration with Brick: Ninja Deterrent™ is firmly fixed while designing anchors and sealing to protect the historic design.
- Lighting: Beam-mounted lights improve nighttime safety. Effective in combination with Ninja Deterrent™.
An example of the Classic Collection. Harmonizes with timeless materials, combining beauty and long-term security.
Written by
Kojiro OtaniFounder of Saitani-Ya Co., Ltd. and creator of the Ninja Deterrent™ brand. Drawing on Japan's tradition of shinobi-gaeshi, he designs and manufactures anti-climb security spikes that pair real deterrence with architectural beauty — writing from first-hand experience in their engineering, production, and real-world installation.
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Column
Guides & Insights
Mar 6, 2026
The Philosophy of 'Beautiful Security' — Why Shinobi Gaeshi Are Decorative
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Mar 6, 2026
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The 4 Principles of CPTED and Japanese Architecture — 'Defensive Design' Learned from Castles
Decoding the four CPTED principles through Japanese castle architecture. Loopholes, masugata barbicans, shinobi gaeshi, and stone walls — applying ancestral wisdom to modern residential security design.
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