The Museum of Modern Japanese Literature, established in 1963 in Tokyo, serves as a vital hub for the preservation and promotion of Japan's literary heritage. Founded by dedicated scholars and literary figures, the museum emerged in response to the challenges faced by Japanese literature throughout history, including the aftermath of wars and censorship. With a collection exceeding 1.2 million documents, including original manuscripts and notable literary works, it offers an invaluable resource for both casual readers and researchers.

In addition to its extensive archives, the museum hosts a variety of programs, including exhibitions, lectures, and summer literature classrooms that connect students with literature. A second branch was established in Narita in 2007, funded entirely through public donations. Recognized as a public interest incorporated foundation, the museum actively engages in educational initiatives and cultural promotion, ensuring that the rich tapestry of modern Japanese literature is accessible to all who wish to delve into its profound history and influential voices.