VC Dimensions of Principal Component Analysis. - Yohji Akama; Kei Irie; Akitoshi Kawamura; Yasutaka Uwano (Discret. Comput. Geom., 2010)

VC dimension of ellipsoids - Yohji Akama; Kei Irie (CoRR, 2011)

On Improving the Accuracy of Object Detection for High Resolution Images Based on SSD. - Kei Irie; Yicheng Qiu; Kiyoshi Nishikawa (APSIPA ASC, 2021)