"Hakama" is a traditional Japanese costume.
A garment that has a crotch and is worn by passing it through both legs is called a "hakama," while one without a crotch is called a "mo."
The design incorporates the hakama into modern life.
The zipper, a distinctive feature of N's 1182 pants, has a uniquely Japanese design inspired by the historical culture of "carrying a Japanese sword" in it.
Since Japanese swords are usually worn on the left hip, the design is such that the center of gravity is on the right side.