All data obtained from @SonOfTheBronx on Twitter:
Son Of The Bronx/Programming Insider

Apr 21, 2018

Time
Show
Ratings
A18-49
10:30pm Dragon Ball Super 953,000 585,000
11:00pm DBZ Kai 790,000 486,000
11:30pm Fooly Cooly 579,000 354,000
12:00am Jojo’s Bizarre Adventure 512,000 308,000
12:30am Gundam IBO 472,000 293,000
1:00am Black Clover 452,000 288,000
1:30am Hunter X Hunter 415,000 255,000
2:00am Naruto Shippuden 398,000 243,000
2:30am Space Dandy 341,000 202,000
3:00am Cowboy Bebop 333,000 198,000
3:00am Ghost In The Shell 323,000 203,000

;
comparison

Apr 22th, 2017

Time
Show
Ratings
A18-49
11:00am Samurai Jack 1,330,000 870,000
11:30am Dragon Ball Super 991,000 634,000
12:00am DBZ Kai 976,000 637,000
12:30am Attack on Titan 826,000 523,000
1:00am Tokyo Ghoul 712,000 448,000
1:30am Hunter X Hunter 659,000 417,000
2:00am Gundam Unicorn 577,000 344,000
2:30am Naruto: Shippuden 547,000 331,000
3:00am Ghost In The Shell 487,000 294,000

If you want more data, you can check my spreadsheet here;. That will have further data including per year difference and A18-49 differences.

Let us know what you think in the comments below about the ratings.