Nanchatte Seifuku (なんちゃって制服) is a Japanese fashion that represents the romanticized school life of female students as portrayed by popular media. The term translates to something along the lines of "pretend school uniform", and the outfits often involves mixing and matching elements of traditional school outfits—like blazers, pleated skirts, and neckties—with casual or trendy pieces.

As an aesthetic, Nanchatte Seifuku heavily focuses on academic visuals and motifs but not so much about the learned subject matter, as the goal is to experience comfort and joy from themes and visuals similar to modest private school life as opposed to high-end boarding school aesthetics like Preppy or the American school based High School Dream . Main themes of the aesthetic include friendship, personal growth, learning, and more.

The fashion is a fun and playful take on Japanese school uniforms. The outfits typically feature a blazer,  pleated skirt, and a cute tie or bow, but they are worn in a more relaxed and laid-back way. Think of it as how students would wear their clothes while on a break instead of in the classroom. It's all about the mix of school nostalgia with current trends among high schoolers!

The outfits are often customized to be more personal, so the fashion is perfect for those who love to express themselves through their style. For example, skirts might be paired with chunky sneakers or knee-high socks for a sporty vibe. Layering is big too—people often add oversized cardigans or hoodies to keep it casual and comfy. Accessories like cute scrunchies, decorated collage bags, or statement jewelry really help personalize the look.

Color palettes can range from soft pastels to bold, eye-catching hues, allowing for plenty of self-expression. Overall, nanchatte seifuku is all about having fun with fashion while capturing that youthful, schoolgirl aesthetic.

One of the most popular activities among those who wear Nanchatte Seifuku is to go to theme parks to make fun memories and take selfies together. Dineyland in particular is popular in Japan where many girls make uniform outfits centered around the themes of their favorite character.  In addition, there's also adult couples who wear school uniforms for their dates in order to roleplay the experience of a high school romance.