Higuchi holds patent rights for his "General-purpose Artificial Intelligence Device and General-purpose Artificial Intelligence Program (Patent No. 6860602) [2021]

While engaged in investment management, he has been researching and developing investment models and the followings are example of his literature.

• MUFG Investment Report *Asset Management and AI - will replace asset managers? [2019]
• "ESG assessment and marker risk in sovereign debt investments" Finance Society in Japan [2023]
• Successful Models of Financial AI | Nikkei BP | Co-authored | Advanced Edition | Contribution a chapter on the application of natural language technology in asset management [2023]
• "Assessing the Role of ESG Evaluation in Market Risk Management for Sovereign Bond Investments." Australasian Finance & Banking Conference [2023], Journal of Sustainable Finance & INvestment [2024]