Labor”, Proc. of the Future Technologies Conference (FTC) 2022, Lecture Notes in Networks and Systems, 2022 Kenji Saito, Kayo Kobayashi, Hirotsugu Ikeya, Naoki Yoshioka, Suzuna Shibasaki, Asuka Takahashi, Atsuki Hashimoto, Yuma Kawanobe, Waki Takekoshi, Asuto Mano, and Tomoyasu Hirano, “Academy Camp VR: Serious Game Constructions as Active Learning Experiences for Children”, Mixed Reality: Games for Education, Health and Training – Joint Conference on Serious Games 2022, Lecture Notes in Computer Science 13476, 2022, pp.39-45 Kenji Saito, Hiroshi Watanabe, Shogo Watanabe, Katsuo Taniguchi, “Proof of authenticity of general IoT information with sensors and blockchain”, Flash Memory Summit 2022, August 2022 , web3 , SBI vol.2, 2022 8 , pp.29-37 Kenji Saito, “A Path to Meta-Nature : Automated Environment Where Even Pencils Grow on A Tree”, CCRC Conference 2022 – Towards a Cyber Civilization Risks and Opportunities, February 2022 Kenji Saito, Satoki Watanabe, “Lightweight selective disclosure for verifiable documents on blockchain”, ICT Express, Volume 7, Issue 3, September 2021, pp.290-294 — 2023 2 — 2023-06 – p.4/8