Design of Digital Notch Filters. - Kotaro Hirano; Shotard Nishimura; Sanjit K. Mitra (IEEE Trans. Commun., 1974)

Optimization of recursive cascade filters. - Kotaro Hirano; Hisashi Sakaguchi; Bede Liu (ICASSP, 1976)

N-path digital filters. - Kazunori Sugahara; Katsuhiko Hayashi; Kotaro Hirano; Sanjit K. Mitra (ICASSP, 1984)

High speed delayed multipath 2-D digital filter structures. - Hon Keung Kwan; Kotaro Hirano (ICASSP, 1986)

Reconfigurable machine and its application to logic diagnosis. - Naoaki Suganuma; Yukihiro Murata; Satoru Nakata; Shinichi Nagata; Masahiro Tomita; Kotaro Hirano (ICCAD, 1992)

11 Multi-dimensional signal processing. - Kotaro Hirano; Takanori Nomura (Signal Processing and its Applications, 1993)

Rectification of Multiple Logic Design Errors in Multiple Output Circuits. - Masahiro Tomita; Tamotsu Yamamoto; Fuminori Sumikawa; Kotaro Hirano (DAC, 1994)

ATM data transmission systems based on N-ISDN. - Changzheng Wang; Masahiro Numa; Kotaro Hirano (IEEE Trans. Commun., 1995)

Maximum Gain Block Classification in Subband Coding of Images. - Tian-Hu Yu; Kotaro Hirano (ICIP (3), 1999)

Layered blind deconvolution with interband prediction. - Hirokazu Masuda; Nobutaka Kuroki; Masahiro Numa; Kotaro Hirano (Syst. Comput. Jpn., 2000)

An Approach for Distance Learning via Internet and Its Evaluation. - Tomoyuki Sowa; Kotaro Hirano (DNIS, 2002)

Applications of mobile research in Japan. - Kotaro Hirano; Yoshio Nakatani; Steve McCarty; Hisayuki Masui (Ubiquity, 2007)