All I can say is electrical and more tech. Yodobashi! Yodobashi! Yodobashi! Manga, Anime, video games. Radio Kaikan's 10 floors of toys and collectibles. So many souvenirs! And for added flair quirky cafes with staff dressed appropriately for each theme. English links below to give you more info..
https://tokyocheapo.com/locations/central-tokyo/akihabara-central-tokyo/
https://www.gotokyo.org/en/destinations/central-tokyo/akihabara/index.html