Yu Nasu

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Yu Nasu, (那須悠) a Japanese computer scientist and Shogi programmer. While affiliated with the Tokyo Institute of Technology , and the Knowledge Media Laboratory, Toshiba, his research focused on natural language processing, speech recognition and speech synthesis as application of hidden Markov model and neural networks.

=Shogi= Along with Hisayori Noda (Nodchip), Jun Okabe, Takahiro Suzuki, and Masatoshi Hidaka, Yu Nasu is member of The Minstrel's Ballad: Tanuki's Reign and subsequently the Ziosoft Computer Shogi Club, developing the Shogi playing entities the end of genesis T.N.K.evolution turbo type D and the 29th World Computer Shogi Champion YaneuraOu.

=NNUE= In 2018, Yu Nasu introduced a new evaluation function based on a shallow neural network whose heavily overparametrized input layer outputs were incremental updated in make and unmake move. This approach, dubbed NNUE (&#398;U&#1048;&#1048; Efficiently Updatable Neural Networks), turned out to become extremely powerful. NNUE was used along with a Stockfish based Shogi adaptation in YaneuraOu, as well in other Shogi playing entities such as Kristallweizen-kai , apparently with superhuman AlphaZero strength. YaneuraOu team member Hisayori Noda aka Nodchip proved that Nasu's idea also works well in western chess, yielding to Stockfish NNUE.

=Selected Publications=
 * Yu Nasu, Koichi Shinoda, Sadaoki Furu (2011). Cross-Channel Spectral Subtraction for meeting speech recognition. ICASSP 2011
 * Ryo Yokoyama, Yu Nasu, Koichi Shinoda, Koji Iwano (2012). Overlapped Speech Detection in Meeting Using Cross-Channel Spectral Subtraction and Spectrum Similarity. INTERSPEECH 2012
 * Yamato Ohtani, Yu Nasu, Masahiro Morita, Masami Akamine (2015). Emotional transplant in statistical speech synthesis based on emotion additive model. INTERSPEECH 2015
 * Yu Nasu (2018). &#398;U&#1048;&#1048; Efficiently Updatable Neural-Network based Evaluation Functions for Computer Shogi. Ziosoft Computer Shogi Club, pdf, pdf (Japanese with English abstract)

=External Links=
 * Yu Nasu's research works | Tokyo Institute of Technology, Tokyo (TITech) and other places, ResearchGate
 * やねうら王 公式サイト | コンピューター将棋 やねうら王 公式サイト (YaneuraOu)
 * GitHub - yaneurao/YaneuraOu: YaneuraOu is the World's Strongest Shogi engine(AI player), WCSC29 1st winner, educational and USI compliant engine

=References= Up one level