Acquiring Vocabulary for Predictive Text Entry through Dynamic Reuse of a Small User Corpus. - Kumiko Tanaka-Ishii; Daichi Hayakawa; Masato Takeichi (ACL, 2003)

Applying Complex-Valued Neural Networks to Acoustic Modeling for Speech Recognition. - Daichi Hayakawa; Takashi Masuko; Hiroshi Fujimura (APSIPA, 2018)

Simultaneous Flexible Keyword Detection and Text-dependent Speaker Recognition for Low-resource Devices. - Hiroshi Fujimura; Ning Ding; Daichi Hayakawa; Takehiko Kagoshima (ICPRAM, 2020)

Mask-based Beamforming Using Complex-valued Neural Network for Recognition of Spatial Target Speech. - Daichi Hayakawa; Takehiko Kagoshima; Hiroshi Fujimura (APSIPA ASC, 2021)

Robust Recognition of Speaker Emotion With Difference Feature Extraction Using a Few Enrollment Utterances. - Daichi Hayakawa; Takehiko Kagoshima; Kenji Iwata; Norbert Braunschweiler; Rama Doddipatla (ASRU, 2023)

Molecular Interaction Fields Describing Halogen Bond Formable Areas on Protein Surfaces. - Daichi Hayakawa; Yurie Watanabe; Hiroaki Gouda (J. Chem. Inf. Model., 2024)

Theoretical Analysis of Hierarchical Language Recognition and Generation by Transformers without Positional Encoding. - Daichi Hayakawa; Issei Sato (ACL (1), 2025)

Three-Dimensional CH/π and CH/N Interactions from Quantum-Mechanical and Database Analyses. - Daichi Hayakawa; Hiroaki Gouda (J. Chem. Inf. Model., 2025)