In December 2021 they adjusted the thresholds a bit and discarded the Silver one for 30,000,000 streams.
Streaming certifcations just start from Gold since then.
I take this point to jump to this year with my posts about the certifications to keep up.
Up to today only four songs managed to reach Diamond for 500,000,00 streams:
Yoru ni kakeru - YOASOBI
Dynamite - BTS
Pretender - Official HIGE DANdism
Dry Flower - Yuuri
Streaming certifications for January 2022
Japanese Music
Diamond
Dynamite - BTS
Platinum
Gira Gira - Ado
Anata ga iru koto de - Uru
silent - SEKAI NO OWARI
Kaiju no Hanauta - Vaundy
Hanataba - back number
Kaito - back number
Daimei no nai Kyo - Dai Hirai
Life Goes On - BTS
Mo Sukoshi dake - YOASOBI
Sangenshoku - YOASOBI
Hani ni Borei - Yorushika
Gold
Kabutomushi - aiko
Sayonara no kyo ni - Aimyon
Ai o shiru made wa - Aimyon
Heart - Aimyon
Yoru naderu meno - Ayase
Not Shy - ITZY
Zankyosanka - Aimer
Apoptosis - Offical HIGE DANdism
Silhouette - KANA-BOON
Ichizu - King Gnu
Shiori - CreepHyp
Rat-tat-tat - Sandaime J SOUL BROTHERS from EXILE TRIBE
Ashita mo - SHISHAMO
Aitsura zenin dosokai - Zutto manoyaka de ii no ni. (Zutomyao)
CHOCOLATE - Chanmina
Heart Shaker - TWICE
Sayonara no mae ni - AAA
Himawari no Yakusoku - Hata Motohiro
Hana Uranai - Vaundy
Watagashi - back number
MIRROR MIRROR - Dai Hirai
Anpanman - BTS
Gifted. - BE:FIRST
Nan Nan - Fujii Kaze
Yasashisa - Fujii Kaze
us - milet
U - millennium parade × Belle
CHE.R.RY - YUI
Infinity - Yuuri
Love Letter - YOASOBI
Taisho Roman - YOASOBI
Eine Kleine - Kenshi Yonezu
Peace Sign - Kenshi Yonezu
Signal - WANIMA
Yoriyoi - Wanuka
Western Music
Platinum
Stay - The Kid LAROI ＆ Justin Bieber
Gold
Galway Girl - Ed Sheeran
Way Back Home - SHAUN
If I Can't Have You - Shawn Mendes
High Hopes - Panic! At the Disco
Work from Home (feat. Ty Dolla $ign) - Fifth Harmony
24K Magic - Bruno Mars
Memories - Maroon 5
What Makes You Beautiful - One Direction