One song from 2018 was certified Platinum this month for selling 250,000 copies: Hoshino Gen’s “Doraemon.”

Two songs from 2018 were certified Gold this month for selling 100,000 copies: Utada Hikaru’s “Play A Love Song” and DA PUMP’s “U.S.A.”

One song was certified Million this month for selling 1,000,000 copies: miwa’s “Hiakri e.”

Million (1,000,000):
miwa – Hiakri e (8/13/12)

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Double Platinum (500,000):
Utada Hikaru – Sakura Nagashi (11/17/12)
Whiteberry – Natsu Matsuri (6/28/06)

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Platinum (250,000):
Hoshino Gen – Doraemon (2/28/18)

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Gold (100,000):
Utada Hikaru – Play A Love Song (4/25/18)
GReeeeN Boys – Koe (1/20/17)
Southern All Stars – Tokyo VICTORY (9/10/14)
Sambomaster – Dekikkonai wo Yaranakucha (2/24/10)
DA PUMP – U.S.A. (6/6/18)
Avicii – The Nights (12/1/14)
Carly Rae Jepsen – Cut To The Feeling (4/28/17)
Taylor Swift – Blank Space (11/26/14)