Exhibition #8: Nikkan Sports from 2012
Claim: Dragon Ball's collected volumes have sold over 350 million copies worldwide
Significance: Published by a major Japanese newspaper, not as part of an ad campaign or promotional push m but as a factual background blurb within a baseball article
Impact: Demonstrates mainstream media acknowledgment of 350M long before Shueisha started using the 260M lowball. This cannot be hand-waved as a "marketing exaggeration."
https://www.nikkansports.com/baseball/news/p-bb-tp0-20120520-953848.html