Here's the first streaming chart of Oricon (12/10 - 12/16):
https://www.oricon.co.jp/rank/st/w/2018-12-24/
01. Konya kono mama -Aimyon - 1,539,441 streams
02. Marygold - Aimyon - 853,150 streams
03. YES or YES - TWICE - 839,524 streams
First combined single chart (12/10 - 12/16]:
https://www.oricon.co.jp/rank/cos/w/2018-12-24/
01. Stand by you - SKE48 - 234,898 points
02. Akai Wana (who loves it?)/ADAMAS - LiSA - 45,398 points
03. BRAVE JEWEL - Roselia - 39,996 points
First combined album chart (12/10 - 12/16):
https://www.oricon.co.jp/rank/coa/w/2018-12-24/
01. ANTI ANTI GENERATION - RADWIMPS - 91,435 points
02. THANX!!!!!!! Neo Best of DA PUMP - DA PUMP - 51,794 ponints
03. 111=1 (Power Of Destiny):Wanna One - Wanna One - 49,707 points
Oricon also displays in the combined chart, how the releases got their points - physical, digital or streaming. E.g. LiSA's new single isn't available for streaming (yet). Aimyon is really big in streaming, but not with actual sales.
For comparison here's the streamig chart from Billboard Japan for (almost) the same week:
Numbers are higher, but Billboard is counting more services.
Oricon counts Apple Music、AWA、KKBOX 、LINE MUSIC、recochoku.
Billboard counts the following:
So it's still not an all-embracing chart, but the first combined one and a step in the right direction.