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a Japanese mathematician, computer scientist and associate professor at Center for Computational Sciences, [https://en.wikipedia.org/wiki/University_of_Tsukuba University of Tsukuba]. His research interests include [https://en.wikipedia.org/wiki/Massive_parallel_processing massively parallel] and [[SIMD and SWAR Techniques|SIMD]] computing, [https://en.wikipedia.org/wiki/Fast_Fourier_transform Fast Fourier transform], and [[Monte-Carlo Tree Search]] applied to [[Shogi]]. He was holding the world record for computing the largest number of digits of [https://en.wikipedia.org/wiki/Pi π ] from April 29 April , 2009 to December 31 December , 2009 <ref>[https://en.wikipedia.org/wiki/Daisuke_Takahashi_(disambiguation) Daisuke Takahashi (disambiguation) from Wikipedia]</ref>.