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A cosine is a trigonometric function. The name was chosen due to the triangular shape the product forms through its pendulum movement.
Introducing the Cosine - a next-generation razor, jointly-developed by MIZUTANI and Mr. Katsuji Oono, a razor specialist.
"It's a tool for customizing each customer’s hairstyle." - Katsuji Oono
Cosine Razor
Cosine Razor - M3 Mizutani

Cosine Razor