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Publications

Papers presented at conferences and journals in Japan and worldwide, authored by PFN researchers, interns, and part-time engineer students, including results of joint research.

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Journal of Machine Learning Research

OptunaHub: A Platform for Black-Box Optimization

Data Science / AutoML

By : Yoshihiko Ozaki, Shuhei Watanabe, Toshihiko Yanase

KDD2026

Conditional PED-ANOVA: Hyperparameter Importance in Hierarchical & Dynamic Search Spaces

Data Science / AutoML

By : Kaito Baba, Yoshihiko Ozaki, Shuhei Watanabe

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Contact us for inquiries on our products, solutions, R&D and other case studies

Contact us for inquiries on our products, solutions, R&D and other case studies

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Co-founders' Message Leadership Milestones AI Governance Corporate Logo

AI Products and Solutions Generative AI Foundation Models Computing Infrastructure AI Chips

Manufacturing Materials & Chemicals Life Sciences Entertainment Retail & Distribution Finance Public Services Education Enterprise

Culture and Benefits FAQ Internship

Technology Business & Culture

Information Security Basic Policy

Cloud Security Policy

AI Products and Solutions Division is ISO 27001-certified for development, commissioned work and provision of products and services.

© 2019-2025 Preferred Networks, Inc.

Co-founders' Message Leadership Milestones AI Governance Corporate Logo

Manufacturing Materials & Chemicals Life Sciences Entertainment Retail & Distribution Finance Public Services Education Enterprise

AI Products and Solutions Generative AI Foundation Models Computing Infrastructure AI Chips

Culture and Benefits FAQ Internship

Technology Business & Culture

Research Publications

Information Security Basic Policy

Cloud Security Policy

AI Products and Solutions Division is ISO 27001-certified for development, commissioned work and provision of products and services.

© 2019-2025 Preferred Networks, Inc.