Amekaji (アメカジ), a portmanteau of "American casual," is a substyle of Japanese Gyaru fashion that was popular during the late 1990s and early 2000s. The aesthetic is an energetic and exaggerated interpretation of American West Coast streetwear, drawing heavily from surf , skate , and hip-hop culture.

The look is defined by its use of bright, bold colors, extensive layering, and a focus on prominent brand logos. A typical Amekaji outfit might consist of an oversized hoodie, a puffer vest, flared pants or a mini skirt, and Ugg-style boots. The style was popularized by brands like COCOLULU and ALBA ROSA and was heavily featured in Gyaru magazines like egg. Like other Gyaru substyles, the clothing is complemented by tanned skin, dramatic makeup, and styled, often bleached, hair.

Amekaji gyaru was popular during late 1990s and early 2000s. This substyle is inspired by the “American Casual”. The term “Amekaji”, was first used in Japan in the 60s, for men’s fashion. From American vintage, preppy, and workwear styles. Amekaji (アメカジ) is a shortening of the words "American" and "casual."

During the mid-2000s, the style started to emerge. Gaining it’s popularity and being popularized by the late-2000s

Amekaji is generally considered to be more of the short lived sub styles of Gyaru. but this style has been revived by gaijin gyarus.