SINGLES＋1 by DEEN has sold 800,000 copies in Japan.
SINGLES＋1 certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Japan |
800,000 | 2x Platinum | May 1998 |
Japan Sales: 800,000
Certification / note: 2x Platinum
Certification Date / sales as of: May 1998
|
| Total sales | 800,000 | (in 1 country) |
Total
Sales: 800,000
(in 1 country)
|
Year-end chart performance for SINGLES＋1
| Chart 1998 | Rank | Sales |
| Japanese Albums (Oricon) |
34 | 781,340 |