Methodology: how numbers are verified

1. Canon first. Manga chapters, guidebooks (Daizenshuu, databooks), production stats from studios and author interviews outrank everything else.

2. Consensus second. Where the author never set a rate, the page uses the widest community and official-store consensus and says so. Example: 1 Berry tracks 1 yen of everyday buying power, backed by Oda basing Berry bills on yen bills and by Mugiwara Stores posting 1 yen = 1 Berry.

3. No invented canon. If no official figure exists, the entry is left out and the page says why. Power levels after the Frieza Saga and the Firebolt price are examples.

4. Estimates are labeled. Dollar and euro outputs depend on real exchange rates, so each currency page states the exact rates used and their date context.

5. One slug per topic. The content registry tracks every converter to prevent duplicates as the site grows toward thousands of pages.