The Recording Industry Association of Japan (or 'RIAJ' for short), has just released the digital recording sales certifications that artists achieved during the month of April.

To announce the certifications, the RIAJ works together with almost all of the digital and mobile download portals in Japan, including recochoku, dwango, music.jp, mu-mo (Avex), oricon ME, and many more. After compiling the data from all the major download portals, the RIAJ then releases the new certifications on the 20th of every month.

For the RIAJ, the thresholds for digital (online and mobile) certifications are as follows:
Gold - 100,000 downloads, Platinum - 250,000 downloads, Double Platinum 500,000 downloads, Triple Platinum 750,000 downloads, and Million - 1,000,000+ downloads.

The April certifications are as follows:

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< Japanese Chaku-Uta > *

No certifications this month.

*Chaku-Uta downloads only get certificated for Double Platinum, Triple Platinum, and Million+!

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< Japanese Chaku-Uta Full >

# Triple Platinum

"Ai wo Komete Hanataba wo" - Superfly : 2008/02/13 (Warner Music Japan)

# Double Platinum

"MR.TAXI" - Shoujo Jidai : 2011/04/26 (Universal Music)

"Baby I Love You" - TEE : 2010/10/06 (Universal Music)

# Platinum

"Iiwake Maybe" - AKB48 : 2009/08/19 (King Records)

"READY STEADY GO" - L'Arc~en~Ciel : 2005/10/19 (Ki/oon Music)

# Gold

"Nemuri Hime" - Acid Black Chery : 2009/02/12 (avex)

"Onara Hazukashi Kunai yo" - Onna Lovely : 2010/02/15 (Yoshimoto R and C)

"Tsukema Tsukeru" - Kyary Pamyu Pamyu : 2011/12/21 (Warner Music Japan)

"Rainy - Ai No Shirabe" - Janne Da Arc : 2005/09/02 (avex)

"Koibito" - Suzuki Masayuki : 2007/03/21 (Epic Records Japan)

"Ikiteru Koto ga Tsurai Nara" - Moriyama Naotaro : 2008/08/20 (Universal Music)

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< Non-Japanese Chaku-Uta Full >

No certifications this month.

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< Japanese Digital (PC) Singles >

# Gold

"Gift" - ET-KING : 2007/09/12 (Universal Music)

"Tsukema Tsukeru" - Kyary Pamyu Pamyu : 2011/12/07 (Warner Music Japan)

"Misenai Namida wa, Kitto Itsuka" - GReeeeN : 2012/02/29 (Universal Music)

"Bo Peep Bo Peep (Japanese ver.)" - T-ARA : 2011/10/05 (EMI Music Japan)

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< Non-Japanese Digital (PC) Singles >

# Gold

"It's My Life" - Bon Jovi : 2007/07/04 (Universal Music)

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Source: RIAJ