He is a Fellow of the Toyota Physical and Chemical Research Institute.
[1] In 1976, he introduced a second quantised formalism for studying reaction-diffusion systems.
[2][3] In 1978 and 1979 he wrote a series of papers with Sir Sam Edwards expanding on the concept of reptation introduced by Pierre-Gilles de Gennes in 1971.
[8] In 2001 the American Physical Society awarded Doi the Polymer Physics Prize for "pioneering contributions to the theory of dynamics and rheology of entangled polymers and complex fluids.
[10] In 2016, he was elected a member of the National Academy of Engineering for contributions to the rheology of polymeric liquids, especially the entanglement effect in concentrated solutions and melts.