these are a couple of my cassettes in my collection
2814 – 新しい日の誕生 (Birth of a New Day) : Strange music that sounds like city ambience 
Saury – City Funk Vol 1/2 : City pop music with chill vibes 
Shiho So – 夜の東京図鑑 (Tokyo Night Zine) : A zine of comics inspired by tracks she has listened to. It also came with a cassette J-Card (Seen in the image) 
Anamanaguchi – Capsule Silence XXIV : Chiptune music 
Mikazuki Bigwave – ROMANTIC : Future funk music (Remixed city pop music) 
Macross 82-99 – Sailorwave II : Future funk music with some remixed sailor moon songs 
Urbanite with a cat – Meteor : Lofi Music 
Saint Pepsi + Luxuary Elite – Late Night Delight : Vaporwave music 
Moe Shop – Moe Moe : Japanese pop inspired music 
Punipunidenki – Wonder Underground : Relaxing Japanese Pop Music
ケニーのグラフィックデザインブログ 