| 2020 | VTS | Ultra-Wideband Modulation Signal Measurement Using Local Sweep Digitizing Method. | Koji Asami, Keisuke Kusunoki, Nobuhiro Shimizu, Yoshiyuki Aoki |
| 2018 | VTS | Innovative practices on test in Japan. | Koji Asami, Yoshiro Tamura, Haruo Kobayashi, Jun Matsushima, Yoichi Maeda, Kazumi Hatayama |
| 2016 | ITC | Novel crosstalk evaluation method for high-density signal traces using clock waveform conversion technique. | Takayuki Nakamura, Koji Asami |
| 2013 | VTS | Novel estimation method of EVM with channel correction for linear impairments in multi-standard RF transceivers. | Koji Asami, Takashi Shimura, Toshiaki Kurihara |
| 2010 | ITC | Evaluation techniques of frequency-dependent I/Q imbalances in wideband quadrature mixers. | Koji Asami, Toshiaki Kurihara, Yushi Inada |
| 2010 | ITC | Timing skew compensation technique using digital filter with novel linear phase condition. | Koji Asami, Hiroyuki Miyajima, Tsuyoshi Kurosawa, Takenori Tateiwa, Haruo Kobayashi |
| 2007 | ITC | An algorithm to evaluate wide-band quadrature mixers. | Koji Asami |
| 2005 | ITC | Technique to improve the performance of time-interleaved A-D converters. | Koji Asami |
| 2002 | ITC | WCDMA Testing with a Baseband/IF Range AWG. | Koji Asami, Yasuo Furukawa, Michael Purtell, Motoo Ueda, Karl Watanabe, Toshifumi Watanabe |
| 1999 | ITC | A method to improve the performance of high-speed waveform digitizing. | Koji Asami, Shinsuke Tajiri |
| 1996 | ITC | Testing the Digital Modulation of PHS Devices. | Koji Asami |