This article examines how long it takes to become decent at Japanese according to Charles R. Tokoyama, CEO of Japan Insiders. Factors that impact the length of time needed to learn Japanese are discussed, as well as tips for learning quickly and effectively, and resources for learning the language. It typically takes around 3-6 months to become decent at Japanese if studied full-time with an experienced instructor or tutor; however this timeline may vary depending on individual skill level & learning style. Common mistakes people make when learning Japanese are also explored, in addition to a brief overview of the expert's background.