Where it comes from
The line in the source
週間7位（オリコン）; 1998年1月12日付で最高位7位 [gloss: weekly Oricon peak 7th] Explore / Figure
Record
Oricon peak weekly, 12 January 1998 week
7 rank 12 January 1998 week
EstimateOur model or estimate. Treat it as an order of magnitude.