Yu Nasu

Home * People * Yu Nasu

Yu Nasu, (那須悠)

a Japanese computer scientist and Shogi programmer. While affiliated with the Tokyo Institute of Technology [1], 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 [2].

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 (ƎUИИ 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 [10], apparently with superhuman AlphaZero strength [11]. YaneuraOu team member Hisayori Noda aka Nodchip proved that Nasu’s idea also works well in western chess, yielding to Stockfish NNUE [12] and in September 2020 to Stockfish 12 [13].

Selected Publications#

[14]

• 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 [15] [16]
• Hisayori Noda, Jun Okabe, Takahiro Suzuki, Masatoshi Hidaka, Yu Nasu, Akio Kono (2017). Shouten Gensou Knights of Tanuki Appeal Document. The Minstrel’s Ballad: Tanuki’s Reign, pdf (Japanese)
• Yu Nasu (2018). ƎUИИ Efficiently Updatable Neural-Network based Evaluation Functions for Computer Shogi. Ziosoft Computer Shogi Club, pdf, pdf (Japanese with English abstract) GitHub - asdfjkl/nnue translation [17]

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 Official Website by Motohiro Isozaki aka Yaneurao
• 将棋ソフト開発者がStockfishに貢献する日 The day when shogi software developers contribute to Stockfish by Yu Nasu, June 2019 » Stockfish NNUE
• GitHub - yaneurao/YaneuraOu: YaneuraOu is the World’s Strongest Shogi engine(AI player), WCSC29 1st winner, educational and USI compliant engine, hosted by Motohiro Isozaki aka Yaneurao

References#

1. ↑ Yu Nasu’s research works | Tokyo Institute of Technology, Tokyo (TITech) and other places, ResearchGate
2. ↑ Yamato Ohtani, Yu Nasu, Masahiro Morita, Masami Akamine (2015). Emotional transplant in statistical speech synthesis based on emotion additive model. INTERSPEECH 2015
3. ↑ WCSC26 participation list by Reijer Grimbergen, SHOGI-L, April 08, 2016
4. ↑ The 27th World Computer Shogi Championship: participant list by Takenobu Takizawa, SHOGI-L, April 17, 2017
5. ↑ Hisayori Noda, Jun Okabe, Takahiro Suzuki, Masatoshi Hidaka, Yu Nasu, Akio Kono (2017). Shouten Gensou Knights of Tanuki Appeal Document. The Minstrel’s Ballad: Tanuki’s Reign, pdf (Japanese)
6. ↑ 第27回世界コンピュータ将棋選手権 参加チーム wcsc27
7. ↑ 第28回世界コンピュータ将棋選手権 wcsc28
8. ↑ Installation instruction of shogi engines, May 28, 2019
9. ↑ 第29回世界コンピュータ将棋選手権 wcsc29
10. ↑ GitHub - Tama4649/Kristallweizen: 第29回世界コンピュータ将棋選手権 準優勝のKristallweizenです。
11. ↑ The Stockfish of shogi by Larry Kaufman, CCC, January 07, 2020
12. ↑ Stockfish NN release (NNUE) by Henk Drost, CCC, May 31, 2020
13. ↑ Stockfish 12, The Stockfish Team, Stockfish Blog, September 02, 2020
14. ↑ dblp: Yu Nasu
15. ↑ hidden semi-Markov model from Wikipedia
16. ↑ Kernel eigenvoice from Wikipedia
17. ↑ Translation of Yu Nasu’s NNUE paper by Dominik Klein, CCC, January 07, 2021

Up one level