Prof. Sakaguchi explained 5G to audience in plain and non-academic words in TV show 「NMBとまなぶくん」.
You want to know what cellular network is, and its evolution history?
You want to know how 5G will change our life, and in 5G era what will disappear?
You want to know what 5G is, and its difference from 4G?
Please refer to this TV show 「NMBとまなぶくん」#351, March 20, 2020..