The time required to achieve fluency in Japanese varies based on individual factors and learning circumstances. According to research and language proficiency standards, it typically takes around 2,200 hours of dedicated study and practice to reach a high level of fluency in Japanese. This estimate assumes an immersive learning environment and consistent effort over the course of several years. However, it’s important to note that fluency is a dynamic concept, and continuous language exposure and practice are essential to maintain and further develop proficiency in Japanese.