Where it comes from
The line in the source
ニンテンドースイッチ版・スマートフォン版合計で5,000万ダウンロードを突破したと発表しました [EN: announced 50m downloads, Switch and smartphone versions combined] Explore / Figure
Record
Cumulative downloads, Nintendo Switch + smartphone combined (TPC statement), to 6 December 2021
50 million (surpassed) To 6 December 2021
ReportedReported by a reliable secondary source, or read carefully from filed documents.