| 2019 | ISCAS | Low Variance Adaptation Method for the LMS-Type Adaptive Filters Based on the Gaussian Model. | Kiyoshi Nishikawa |
| 2012 | APSEC | SaaS Application Framework Using Information Gateway Enabling Cloud Service with Data Confidentiality. | Kiyoshi Nishikawa, Kenji Oki, Akihiko Matsuo |
| 2004 | ICIP | Efficient packet loss protection for JPEG2000 images enabling backward compatibility with a standard decoder. | Khairul Munadi, Masayuki Kurosaki, Kiyoshi Nishikawa, Hitoshi Kiya |
| 2003 | ISCAS | Error protection for JPEG2000 encoded images and its evaluation over OFDM channel. | Khairul Munadi, Masayuki Kurosaki, Kiyoshi Nishikawa, Hitoshi Kiya |
| 2001 | ISCAS | Low-bit motion estimation with edge enhanced images for lowpower MPEG encoder. | Ayuko Takagi, Kiyoshi Nishikawa, Hitoshi Kiya |
| 2000 | ICASSP | Fast implementation technique for improving throughput of RLS adaptive filters. | Kiyoshi Nishikawa, Hitoshi Kiya |
| 1997 | ICASSP | A new pipelined architecture of the LMS algorithm without degradation of convergence characteristics. | Katsushige Matsubara, Kiyoshi Nishikawa, Hitoshi Kiya |
| 1995 | ICASSP | Improvement of convergence speed for subband adaptive digital filters using the multirate repeating method. | Koji Ashihara, Kiyoshi Nishikawa, Hitoshi Kiya |
| 1994 | ICASSP | An LS based new gradient type adaptive algorithm-least squares gradient. | Kiyoshi Nishikawa, Hitoshi Kiya |
| 1994 | ISCAS | A Technique to Improve Convergence Speed of the LMS Algorithm. | Kiyoshi Nishikawa, Hitoshi Kiya |
| 1993 | ICASSP | A parallel AR spectral estimation using a new class of filter bank. | Kiyoshi Nishikawa, Kyoko Miyazaki, Hitoshi Kiya |
| 1992 | ICASSP | Property of circular convolution for subband image coding. | Kiyoshi Nishikawa, Hitoshi Kiya, Masahiko Sagawa |