SECRET was a girl group formed by TS Entertainment in 2009 with members Hyosung, Hana, Jieun, and Sunhwa, the group has sold more than 181K physical copies combined between South Korea and Japan.
Here is a summary of their sales in both countries.
Korean Discography: 93,801 copies sold
샤이보이
Shy Boy
Format: 1st Single Album
Release Date: January 6th, 2011
1st Month Sales (Gaon): 7,818 copies sold (#11)
Total Sales in South Korea (Gaon): 13,946 copies sold
13,946 copies sold in 2011
별빛달빛
Byeolbit Dalbit
Starlight, Moonlight
Format: 2nd Single Album
Release Date: June 1st, 2011
1st Month Sales (Gaon): 8,410 copies sold (#9)
Total Sales in South Korea (Gaon): 12,106 copies sold
12,106 copies sold in 2011
Moving In Secret
Format: 1st Full Album
Release Date: October 18th, 2011
1st Month Sales (Gaon): 14,385 copies sold (#10)
Total Sales in South Korea (Gaon): 17,304 copies sold
16,619 copies sold in 2011
685 copies sold in 2012
POISON
Format: 3rd Mini Album
Release Date: September 13th, 2012
1st Month Sales (Gaon): 9,845 copies sold (#10)
Total Sales in South Korea (Gaon): 11,159 copies sold
11,159 copies sold in 2012
Letter From Secret
Format: 4th Mini Album
Release Date: April 30th, 2013
1st Month Sales (Gaon): 6,422 copies sold (#15)
Total Sales in South Korea (Gaon): 8,690 copies sold
8,690 copies sold in 2013
Gift From Secret
Format: 3rd Single Album
Release Date: December 9th, 2013
1st Month Sales (Gaon): 5,051 copies sold (#24)
Total Sales in South Korea (Gaon): 5,051 copies sold
5,051 copies sold in 2013
SECRET SUMMER
Format: 4th Mini Album
Release Date: August 11th, 2014
1st Day Sales (Hanteo): 171 copies sold
1st Month Sales (Gaon): 10,303 copies sold (#8)
Total Sales in South Korea (Gaon): 11,051 copies sold
11,051 copies sold in 2014
Japanese Discography: 87,518 copies sold
Madonna
Format: 1st Single
Release Date: August 3rd, 2011
1st Week Sales (Oricon): 13,124 copies sold
Total Sales in Japan (Oricon): 25,081 copies sold
Shy Boy
Format: 1st Mini Album
Release Date: November 16th, 2011
1st Week Sales (Oricon): 9,318 copies sold
Total Sales in Japan (Oricon): 17,560 copies sold
これくらいのサヨナラ
Kore Kurai no Sayonara
So Much for Goodbye
Format: 2nd Single
Release Date: February 29th, 2012
1st Week Sales (Oricon): 7,816 copies sold
Total Sales in Japan (Oricon): 10,043 copies sold
TWINKLE TWINKLE
Format: 3rd Single
Release Date: June 13th, 2012
1st Week Sales (Oricon): 5,587 copies sold
Total Sales in Japan (Oricon): 8,022 copies sold
WELCOME to SECRET TIME
Format: 1st Album
Release Date: August 22nd, 2012
1st Week Sales (Oricon): 9,437 copies sold
Total Sales in Japan (Oricon): 12,249 copies sold
I Do I Do
Format: 4th Single
Release Date: February 5th, 2014
1st Week Sales (Oricon): 8,214 copies sold
Total Sales in Japan (Oricon): 8,457 copies sold
YooHoo
Format: 5th Single
Release Date: July 23rd, 2014
1st Week Sales (Oricon): 6,106 copies sold
Total Sales in Japan (Oricon): 6,106 copies sold