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Last Updated: Jul 13, 2026

Achievement in Competitive Programming

• ICPC 2025 World Finals 2nd place (out of 10,000+ teams)

• ICPC 2025 Asia Pacific Championship 1st place (out of 2,000+ teams)

• International Olympiad in Informatics (IOI) 3x Gold medal

• Accepted 7 proposed problems in IOI (world record)

Books

Sold 100,000+ copies in total

• Algorithms x Mathematics: For efficient problem solving (Japanese book), 2022

• 77 key techniques in  competitive programming (Japanese book), 2022

• High-school math in 150 minutes (Japanese book), 2023

Research Publications

Top-conference level achievements in both Algorithm Theory & AI Applications

1. [First Author] Masataka Yoneda, Yusuke Matsushita, Go Kamoda, Kohei Suenaga, Takuya Akiba, Masaki Waga, and Sho Yokoi. SoftMatcha 2: A Fast and Soft Pattern Matcher for Trillion-Scale Corpora

   • https://arxiv.org/abs/2602.10908

   • Accepted at ICML 2026

2. [First Author] Ken-ichi Kawarabayashi, Hirotaka Yoneda, and Masataka Yoneda. Online Graph Coloring for k-colorable graphs

   • https://arxiv.org/abs/2511.16100

   • Got "top 50% of accepted paper" review from 2 out of 3 reviewers at STOC 2026

3. [First Author] Online Coloring for Graphs of Large Odd Girth

   • https://arxiv.org/abs/2604.27690

   • Accepted at ESA 2026

4. [Second Author] Fair Division with Soft Conflicts

   • https://arxiv.org/abs/2602.20929 

Other Achievements

• Delivered 20+ invited lectures across Japan

• 990,000+ views on SpeakerDeck, individually ranked 2nd in Japan for technical presentations

Contact

• Email: e869120@gmail.com (contact via this email for job offer!)

• Twitter: @e869120

• GitHub: https://github.com/E869120 (2,800+ stars)