Current Works

• Founder and Security Researcher, Nyx Foundation
• Organizer, ZK Tokyo

Interest Area

• Distributed Computing
• Verifiable Computation
• Semiconductor
• Analog Computer

Knowledges & Skills

• Cloud: AWS, Kubernetes, OpenStack
• Blockchain: BFT Consensus, zkRollup, Bridges
• Mobile/Web/Server-side: Swift, Rust, TypeScript, Python, etc
• Cryptography: Zero-knowledge Proofs, Multi-party Computation, Anonymous Authentication

Work

• Comparing Digital Signature Schemes for Anonymous Authentication
  • presented at SCIS’24 https://www.iwsec.org/scis/2024/program.html
  • presented at SCIS:’25 https://www.iwsec.org/scis/2025/program.html
• Designing Privacy-Preserving Unsecured Loan DeFi Protocol
  • presented at CSEC’24 https://jglobal.jst.go.jp/detail?JGLOBAL_ID=202402273725098254
• Designing Privacy-Preserving Mathematical Optimization Protocol (Min-Cost Flow)
  • published a collaborative work with Ethereum Foundation https://eprint.iacr.org/2024/203
• Designing Verifiable Computation Protocol
  • published work https://ethresear.ch/t/gkrfold-sumfold-based-gkr-proof-compression/21788
  • implemented https://github.com/grandchildrice/gkrfold
• Benchmarking Verifiable Computation Protocols (zkVMs)
  • presented at SCIS’25 https://www.iwsec.org/scis/2025/program.html
  • accepted at ZKProof7 https://zkproof.org/events/zkproof-7-sofia/
  • presentation archive: https://www.youtube.com/live/LMLfA1N5Has?app=desktop
• Designing Secure Blockchain Bridge Protocol without sending tokens
  • accepted at CANS’25 Poster https://cy2sec.comm.eng.osaka-u.ac.jp/miyaji-lab/event/cans2025/posters/

Activities

• Hackathon
  • Decentralized Identity Foundation Hackathon 2023: Whole 2nd, TBD 1st, Trinsic 1st
  • ETHGlobal Tokyo Hackathon 2023: Whole Finalist, Lit 2nd Prize
  • Astar Network Hackathon 2022: Whole 1st
• Open Source Contribution
  • docknetwork/crypto
  • tlsnotary/tlsn
  • pse/folding-schemes
  • pse/zk-evm-circuits
  • MystenLabs/sui
  • ethereum/go-ethereum
  • erigontech/erigon
  • …

Previous Works

• Master in Cryptography, Waseda University Sako Laboratory
• Grantee, Fenbushi Capital
• Grantee, Novanet
• Grantee, Ethereum Foundation
• Founder CEO, PENTA
• Infra Dev, Camel (2020/03~2020/11)
• MLOps, Aidemy Modeloy (2019/02~2019/12)

My Love

• Soccer (experienced for 12+ years)
• Squat
• Nature
• Travel