His website has his policy and plans.
https://kenakamatsu.jp/basic-policy
This is just me doing a rough translation from his policy page.
1. Freedom of expression. He is against more strict censorship of anime, manga, and game depiction because there are already laws against real child porn, while ACG contents are not real, so it's not right to punish the creators when there are no real victims. Fight against outside preasure to censor ACG.
2. Improve Japan GPD via exporting of Japan anime, game and manga. Cracking down on pirate anime and manga sites. Promote esports and pro gaming scene in Japan.
3. Protect creator and fan creations. Doujins, cosplays ect. will not be considered illegal nor will the creators be sued for copyright infringement. Offer health benefits and better pay for freelancers in anime, manga sections. Have better health coverage for mangaka, and other ACG industry people. Create an archive for all ACG creations. Allow out of print, or no longer copyrighted books to be available as free.
4. Improve Japan's technology. Put more focus on computer, and programing, AI research. Start a more advanced space program. Improve and standardize network infrastructure. Allow immigration to bring in more experts from overseas.
5. Have games, anime, and manga do educational programs to educate children, and encourage them in those fields. Improve children literacy. Promote computer engineering, and IT fields for children. Promote work from home, and distance learning.
These are just a quick translation. As for my thoughts...there's good, and bad in his policy.