Recochoku has an album chart at the end of the year. But without actual sales, just position. Don't know if iTunes has a yearly chart.
RIAJ only gives certifications from 100,000 upwards.
For digital downloads only songs are certified, not whole albums.
You're just able to evaluate how an album sold digitally when shops like recochoku or iTunes publishes a chart.
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「変わらないなら 変えるしかない」
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