It's interesting to see what's happening in the music scene.
Spotify got bigger in Japan, the numbers of plays on the daily charts rose from around 25k a day to 45k a day for the top 3 songs.
Though that's still pretty small in number compared to other countries - in the US top songs have around 1.5 million plays a day, in Britain around 450k and in Germany around 400k and so on (only domestic accounts are counted for those chart, while the total amount of plays of a song must be international).
But Ai no Uta is simply stable in streaming numbers on Spotify.
The song already had around 5k plays a day a year ago - so if you count 5k a day for a year, being at 3.3 now is logical.
Billboard also announced they're going to release a regular global Top 100 chart - based only on streaming and digital downloads. Which basically means Japan won't pop up there, cause in 2018 it still was about 80% physical and 20% digital/streaming. Only someone like Aimyon has a chance because of her streaming numbers or if Kenshi Yonezu has another hit like Lemon which took off over youtube and digital donwloads.
Kuu working on the concepts of the shows:
Btw. the 07+13 as a pair for a hint to her 20th Anni was intentional. Her Twitter account answered to posts like that: