Factory Tour of Komatsu Oyama Plant. - Sadaji Hayama (Int. J. Autom. Technol., 2009)

Editorial: Precision and Ultraprecision Positioning. - Jiro Otsuka; Sadaji Hayama (Int. J. Autom. Technol., 2009)

Factory Tour of the Ashikaga Plant of Hamai Co., Ltd. - Sadaji Hayama (Int. J. Autom. Technol., 2011)