BEST～FIRST THINGS～ by KODA KUMI (倖田 來未) has sold 2,000,000 copies in Japan.
BEST～FIRST THINGS～ certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Japan |
2,000,000 | 2 x Million | April 2006 |
Japan Sales: 2,000,000
Certification / note: 2 x Million
Certification Date / sales as of: April 2006
|
| Total sales | 2,000,000 | (in 1 country) |
Total
Sales: 2,000,000
(in 1 country)
|
Year-end chart performance for BEST～FIRST THINGS～
| Chart 2005 | Rank | Sales |
| Japanese Albums (Oricon) |
6 | 1,207,793 |
| Chart 2006 | Rank | Sales |
| Japanese Albums (Oricon) |
17 | 642,842 |