What this is
Marketplace/industry total, not secondary GMV; undated estimate.
Where it comes from
Japanese-language article: Collector and resale market, 2026 マネー現代 · 10 April 2026 Open the original ↗
The line in the source
トレカ業界は約3,000億円の市場に成長した。 In English
The trading card industry grew into a ~300 billion yen market