5 1/2 by KOME KOME CLUB (米米CLUB) has sold 400,000 copies in Japan.
5 1/2 certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Japan |
400,000 | 1x Platinum | November 1989 |
Japan Sales: 400,000
Certification / note: 1x Platinum
Certification Date / sales as of: November 1989
|
| Total sales | 400,000 | (in 1 country) |
Total
Sales: 400,000
(in 1 country)
|
Year-end chart performance for 5 1/2
| Chart 1989 | Rank | Sales |
| Japanese Albums (Oricon) |
50 | 231,490 |
| Chart 1990 | Rank | Sales |
| Japanese Albums (Oricon) |
89 | 138,870 |