Takuya Akiba
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Takuya Akiba is a Staff Research Scientist at Sakana AI, where he works on optimization and AI research systems. He previously worked at Preferred Networks, where he was a lead developer of Optuna, a widely used open-source hyperparameter optimization framework. He is also known in the competitive programming community, having built a strong track record in contests such as ICPC and Kaggle competitions under the handle iwiwi. At Sakana AI, he has contributed to projects like ShinkaEvolve, an evolutionary code-optimization framework, which his team used to place first in the 2025 ICFP Programming Contest.
Updated 5 August 2026
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2026
Sakana AI's ALE-Agent wins first place in AtCoder Heuristic Contest 058 Benchmark result