I-201 was the name ship of her class of high-speed submarines built for the Imperial Japanese Navy during World War II. She was commissioned in February 1945, and the war ended before she could carry out an operational patrol. She surrendered to the United States Navy in 1945 and was sunk as a target in 1946.

The I-201-class submarines were submarines of the Imperial Japanese Navy during World War II. These submarines were of advanced design, built for high underwater speed, and were known as Sentaka-Dai type submarine or Sentaka type submarine . The type name, was shortened to Suichū Kōsoku Sensuikan Ō-gata .