I couldn't resist searching myself. It looks like there is a physical copy of the conference proceedings in a library in Japan! https://topics.libra.titech.ac.

I couldn't resist searching myself. It looks like there is a physical copy of the conference proceedings in a library in Japan! https://topics.libra.titech.ac.jp/recordID/catalog.bib/BA90249906?hit=7&caller=xc-search https://topics.libra.titech.ac.jp/recordID/catalog.bib/BA902...