The Mathematical Society of Japan (MSJ) is a professional organization dedicated to the advancement of mathematics in Japan. Founded in 1946, it aims to promote mathematical research, education, and collaboration among mathematicians. The society organizes conferences, publishes research journals, and supports various mathematical activities. The MSJ also plays a significant role in fostering international cooperation in mathematics. It collaborates with other mathematical societies and participates in global initiatives. Through its efforts, the society contributes to the development of mathematics as a discipline and encourages young mathematicians to engage in research and education.