NEPTUNE by TOSHINOBU KUBOTA (久保田 利伸) has sold 400,000 copies in Japan.
NEPTUNE certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Japan |
400,000 | 1x Platinum | July 1992 |
Japan Sales: 400,000
Certification / note: 1x Platinum
Certification Date / sales as of: July 1992
|
| Total sales | 400,000 | (in 1 country) |
Total
Sales: 400,000
(in 1 country)
|
Year-end chart performance for NEPTUNE
| Chart 1992 | Rank | Sales |
| Japanese Albums (Oricon) |
30 | 483,560 |