Recent trends in Japan have seen an increased uptake in navy blue gym outfits in schools. The move is driven by the need to guard against potential privacy breaches due to transparent clothing, particularly in cases where students' undergarments may unintentionally become visible. This precautionary shift is gaining momentum in several Japanese schools across the country, reflecting heightened awareness and sensitivity towards individual privacy issues.

Sensitivity and respect for privacy in public spaces, such as schools, is highly valued in Japan. It is thus not surprising that such measures are deemed necessary for school environments. In addition, the increasing prevalence of navy blue gym outfits may also be symbolic of the traditional role of education, which is greatly respected in Japan, and the conformity often associated with it.

In the US or EU, generally, the focus when it comes to school uniforms tends to be more on the actual design rather than the color. However, concerns about transparency of gym outfits and student privacy are shared globally, leading to various schools implementing their own measures, such as dress codes, to protect students' privacy.