Q.E.D. by ACID BLACK CHERRY has sold 100,000 copies in Japan.
Q.E.D. certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Japan |
100,000 | 1x Gold | August 2009 |
Japan Sales: 100,000
Certification / note: 1x Gold
Certification Date / sales as of: August 2009
|
| Total sales | 100,000 | (in 1 country) |
Total
Sales: 100,000
(in 1 country)
|
Year-end chart performance for Q.E.D.
| Chart 2009 | Rank | Sales |
| Japanese Albums (Oricon) |
74 | 110,722 |