Where it comes from
The line in the source
pg=727 | hitCnt 81 | 拡張パック「一撃マスター」 | 2021年 1月22日（金） Explore / Figure
Record
Cards in set (card-search hitCnt), released 22 January 2021
81 cards Released 22 January 2021
ReportedReported by a reliable secondary source, or read carefully from filed documents.