Tadashi Watanabe (渡辺 貞,Watanabe Tadashi; born October 1944) is a Japanese computer engineer. Watanabe is the project manager of theRIKEN Next-Generation Supercomputer R&D Center. He played a central role in the development of theNEC SX architecture. Watanabe was awarded theEckert–Mauchly Award in 1998, and theSeymour Cray Computer Engineering Award in 2006.

• Short RIKEN biography
• NEC press release following his award of the Cray award

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