- 2001 SITA Encouragement Award (by The Society of Information Theory and its Applications (SITA)): "Variable length universal entanglement concentration by local operations"
- Japan IBM prize with computer science section 2010: "Universal protocol in quantum information and its application to quantum key distribution"
- Funai Foundation for information Tecnology Award computer science section 2010: "Universal quantum information protocol and its application to quantum cryptography"
- 2011 IEEE Information Theory Society Paper Award:
"Information Spectrum Approach to Second-Order Coding Rate in Channel Coding"

(See also Prestigious information theory award won by CQT's Mashito Hayashi)

- FY2015 JSPS PRIZE:
"Information Theory and Quantum Information Theory for Finite-Coding-Length"

- 12th Japan Academy Medal:
"Information Theory and Quantum Information Theory for Finite-Coding-Length"

(See also Visiting Professor Masahito Hayashi claims high-profile Japanese science prizes)

- IEEE Fellow (2017) for contributions to Shannon theory, information-theoretic security, and quantum information theory