Single-sex education has been a part of Japanese culture for over 100 years, with the first all-girls school founded in 1876 and the first all-boys school founded in 1877. While single-sex education is no longer mandatory, there are still a significant number of all-boys and all-girls schools in Japan. Co-educational schools are becoming more popular at the elementary level, offering a more inclusive environment where both boys and girls can learn together. Both types of schools have their advantages and disadvantages, but ultimately it's up to parents and educators to decide which type of school is best for their children. Gender equality has become an increasingly important issue in Japanese society, and many schools are taking steps to promote gender equality by offering equal opportunities for both genders.