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

June 23rd, 2018

Time
Show
Ratings
A18-49
10:30pm Dragon Ball Super 885,000 562,000
11:00pm DBZ Kai 783,000 477,000
11:30pm My Hero Academia 661,000 379,000
12:00am Fooly Cooly Progressive 546,000 321,000
12:30am Jojo’s Bizarre Adventure 457,000 276,000
1:00am Hunter X Hunter 418,000 265,000
1:30am Black Clover 439,000 287,000
2:00am Naruto Shippuden 439,000 291,000
2:30am Space Dandy 385,000 226,000
3:00am Cowboy Bebop 299,000 188,000
3:30am Lupin The Third 292,000 172,000

;
comparison

June 24th, 2017

Time
Show
Ratings
A18-49
11:00am Samurai Jack 972,000 577,000
11:30am Dragon Ball Super 1,035,000 653,000
12:00am DBZ Kai 1,018,000 639,000
12:30am Attack on Titan 858,000 542,000
1:00am Tokyo Ghoul 724,000 483,000
1:30am Hunter X Hunter 561,000 380,000
2:00am Lupin The 3rd 500,000 334,000
2:30am Naruto: Shippuden 480,000 318,000
3:00am Ghost In The Shell 470,000 317,000

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.