MIRAGE - a simple-model routing program for the hierarchical layout design of IC masks. - Koji Sato; Takao Nagai; Hiroyoshi Shimoyama; Toshihiko Yahara (DAC, 1979)

A "grid-free" channel router. - Koji Sato; Hiroyoshi Shimoyama; Takao Nagai; Masaru Ozaki; Toshihiko Yahara (DAC, 1980)

MILD - A cell-based layout system for MOS-LSI. - Koji Sato; Takao Nagai; Mikio Tachibana; Hiroyoshi Shimoyama; Masaru Ozaki; Toshihiko Yahara (DAC, 1981)