Iwanami Shoten, Publishers (株式会社岩波書店 Kabushiki Gaisha Iwanami Shoten) is a Japanese publishing company in Tokyo.
Iwanami Shoten was founded in 1913 by Shigeo Iwanami. Its first major publication was the novel Kokoro in 1914. It is known for scholarly publications, editions of classical Japanese literature, dictionaries, and high-quality paperbacks. It publishes Kōjien, widely regarded as the most authoritative dictionary of Japanese.
Its head office is at Hitotsubashi 2–5–5, Chiyoda, Tokyo.