The ultra small HDD for the mobile applications. - Akihiko Takeo; Kazuhito Shimomura; Jun Itoh (Hot Chips Symposium, 2006)

A study on read-back signal generation modeling for shingled-write magnetic recording from experimental results. - Kohsuke Harada; Yasushi Tomizawa; Akihiko Takeo; Yuuichi Yamada; Kazuto Kashiwagi; Kenji Yoshida (ISITA, 2012)

Multi-Level Read/Write Signaling Using Pulse Width Modulation for High Density Perpendicular Magnetic Recording. - Kohsuke Harada; Akihiro Yamazaki; Akihiko Takeo (IEEE Commun. Lett., 2017)

Robust Modulation of PWM-Based Multi-Level Perpendicular Magnetic Recording for Conventional Media. - Kohsuke Harada; Nobuhiro Maeto; Akihiro Yamazaki; Akihiko Takeo (IEEE Commun. Lett., 2018)