Will PSA and CGC grade One Piece cards?
Summary
Both do. PSA says it grades vintage, modern, and TCG cards, and its cert lookup returns One Piece cards filed under the TCG Cards category. CGC says it grades virtually all trading card games and does not list One Piece among the cards it turns away.
How PSA records a One Piece card
PSA cert 154250293, a Monkey.D.Luffy card from the OP09 set, is one example. The Brand/Title field reads "ONE PIECE OP09-EMPERORS IN THE NEW WORLD," the Card Number field is just "119," and the Category is "TCG Cards." The version of the art, "MANGA ALTERNATE ART," goes in the Variety/Pedigree field. The grade on this one is MINT 9.
What PSA charges
In the US, PSA's Standard tier costs $59.99 per card, with an estimated turnaround of 90 to 100 business days and a $1,000 maximum insured value. PSA Japan's Standard tier is ¥9,980 per card including tax, with a 100 business day estimate and a ¥150,000 declared value limit, counted from the day PSA emails that the package has arrived. The cheaper Value tiers are paused in both countries.
Sources
Details are as published on these pages on the date above and can change. Check the official page before you buy or submit.