apparently JVA released the NT list the same day Hisamitsu launched their Tokyo Olympics sponsor site which was already a week before JVA officially posted it on social media
This is the website. Nagaoka is there but not Iwasaka. A huge hint is that only Ishii and Nagaoka are part of the OLYMPIC STARS section and not Arisa Inoue
https://2020.hisamitsu/athletes/
Nagaoka never failed during her brief moments in the court. Still scoring better than Inoue and Nakagawa. She's still not receiving though which is a huge minus.
Also interestingly, Japanese fans are saying Hayashi is going to be used as an opposite. She will be the one filling in for Shinnabe. Kurogo will also play as opposite and if Yoshino makes it that far she will also be used as an opposite.