So RIAJ posted on the recent month certifications for legal downloads the got piled up for
full tracks (full songs) and ayu got some which was pretty nice to see.
You & Me, how beautiful you are and crossroad getting a certification and others that got gold, were a bit more popular than we initially thought (because they got "only gold" on that time).
M - Platinum (250,000+)
glitter - Platinum (250,000+)
Rule - Platinum (250,000+)
You were... - Platinum (250,000+)
A Song for xx - Gold (100,000+)
teddy bear - Gold (100,000+)
No way to say - Gold (100,000+)
Memorial address - Gold (100,000+)
Moments - Gold (100,000+)
Sunset ~LOVE is ALL~ - Gold (100,000+)
You were... - Platinum (250,000+)
crossroad - Gold (100,000+)
how beautiful you are - Gold (100,000+)
You & Me - Gold (100,000+)
2015 Additions
Who... - Platinum (250,000+)
HANABI - Gold (100,000+)
Full List - Updated At January 2015
Spoiler:
In Chronological Release Order
Full Songs
A Song for xx - Gold (100,000+)
Who... - Platinum (250,000+)
SEASONS - Gold (100,000+)
teddy bear - Gold (100,000+)
M - Platinum (250,000+)
evolution "Original Mix" - Gold (100,000+)
Dearest ~Original Mix~ - Gold (100,000+)
HANABI (100,000+)
Voyage - Gold (100,000+)
No way to say - Gold (100,000+)
Memorial address - Gold (100,000+)
Moments - Gold (100,000+)
STEP you - Gold (100,000+)
fairyland - Gold (100,000+)
HEAVEN - Gold (100,000+)
Startin' - Gold (100,000+)
BLUE BIRD - Gold (100,000+)
JEWEL - Platinum (250,000+)
part of Me - Gold (100.000+)
glitter - Platinum (250,000+)
talkin' 2 myself - Gold (100,000+)
fated - Gold (100,000+)
Together When... - Platinum (250,000+)
MY ALL - Gold (100,000+)
Mirrorcle World - Gold (100,000+)
GREEN - Gold (100,000+)
Days - Platinum (250,000+)
Rule - Platinum (250,000+)
Sunrise ~LOVE is ALL~ - Platinum (250,000+)
Sunset ~LOVE is ALL~ - Gold (100,000+)
You were... - Platinum (250,000+)
MOON - Gold (100,000+)
crossroad - Gold (100,000+)
Virgin Road - Gold (100,000+)
Love song - Gold (100,000+)
progress - Gold (100,000+)
how beautiful you are - Gold (100,000+)
You & Me - Gold (100,000+)
Chaku uta
Moments - Double Platinum (500,000+)
INSPIRE - Triple Platinum (750,000+)
CAROLS - Million (1,000,000+)
STEP you - Triple Platinum (750,000+)
fairyland - Triple Platinum (750,000+)
HEAVEN - Million (1,000,000+)
BLUE BIRD - Triple Platinum (750,000+)
momentum - Gold (100,000+)
JEWEL - Triple Platinum (750,000+)
glitter - Double Platinum (500,000+)
Together When... - Triple Platinum (750,000+)
Days - Double Platinum (500,000+)
Sunrise ~LOVE is ALL~ - Double Platinum (500,000+)
You were... - Double Platinum (500,000+)
http://www.riaj.or.jp/data//others/chart/w140228.html