Market Index
OPBOX Index — the whole One Piece box market in one number
- The OPBOX Index — an equal-weight index of 18 Japanese One Piece booster boxes (Jan 7, 2026 = 100) — stands at 157.4 as of 2026-07-18, up 57.4% since January.
- Over the past week the index moved -1%.
- In the week of 2026-07-08, collectors sent 17,526 One Piece cards to PSA (+30.4% vs the prior week); 608,756 have been graded all-time.
- The strongest set since January is PRB-01 (+113.2%); the weakest is OP-16 (-31.9%).
- Measured against original Japanese retail MSRP, OP-01 now trades at 10.7x its launch price ($29 MSRP → $313).
Equal-weight index of 18 Japanese booster boxes with a tracked price on 2026-01-07 (=100). Sets first tracked after that date (OP-02, OP-15, OP-16) are shown individually but excluded from the index. Prices carry forward on days without a new reading. Jan 7, 2026 = 100. As of 2026-07-18. Not investment advice.
Opening Meter — how fast product is being ripped
Every graded card came out of a sealed pack, so weekly PSA grading volume is a live read on how fast One Piece product is being opened. In the week of 2026-07-08, 17,526 cards were graded — up 30.4% from the week before. All-time, 608,756 One Piece cards have been PSA-graded across the sets we track.
Weekly new PSA grades, summed across all tracked sets. Grading has a turnaround lag, so recent weeks may revise up.
Every set since January 2026
Ranked by price change since our tracking began (Jan 7, 2026 — not since each set's launch, which we did not track for older sets). Tap a set for its full page.
| # | Set | Start price | Now | Change | vs MSRP | Reprints |
|---|---|---|---|---|---|---|
| 1 | PRB-01 Premium Booster | $68 | $145 | +113.2% | 4.3x $34 MSRP | 1 |
| 2 | OP-01 Romance Dawn | $150 | $313 | +108.7% | 10.7x $29 MSRP | — |
| 3 | OP-08 Two Legends | $47 | $85 | +80.9% | 2.6x $32 MSRP | — |
| 4 | OP-11 A Fist of Divine Speed | $70 | $120 | +71.4% | 3.7x $32 MSRP | 1 |
| 5 | EB-02 Anime 25th Collection | $63 | $108 | +71.4% | 3.3x $32 MSRP | — |
| 6 | OP-13 Carrying on His Will | $78 | $131 | +67.9% | 4x $32 MSRP | 2 |
| 7 | OP-03 Pillars of Strength | $90 | $149 | +65.6% | 5.1x $29 MSRP | — |
| 8 | OP-07 500 Years in the Future | $51 | $82 | +60.8% | 2.5x $32 MSRP | — |
| 9 | OP-09 Emperors in the New World | $74 | $114 | +54.1% | 3.5x $32 MSRP | 1 |
| 10 | OP-10 Royal Blood | $52 | $80 | +53.8% | 2.5x $32 MSRP | — |
| 11 | EB-03 Heroine's Edition | $84 | $126 | +50% | 3.9x $32 MSRP | — |
| 12 | OP-14 The Azure Sea's Seven | $63 | $88 | +39.7% | 2.7x $32 MSRP | — |
| 13 | OP-12 Legacy of the Master | $53 | $73 | +37.7% | 2.2x $32 MSRP | — |
| 14 | OP-06 Wings of the Captain | $73 | $99 | +35.6% | 3x $32 MSRP | 1 |
| 15 | PRB-02 Premium Booster | $58 | $77 | +32.8% | 2.3x $34 MSRP | — |
| 16 | OP-04 Kingdoms of Intrigue | $82 | $108 | +31.7% | 3.3x $32 MSRP | — |
| 17 | OP-05 Awakening of the New Era | $126 | $163 | +29.4% | 5x $32 MSRP | — |
| 18 | EB-01 Memorial Collection | $90 | $116 | +28.9% | 3.6x $32 MSRP | 1 |
| 19 | OP-02 Paramount War | $113from Jan 13 | $136 | +20.4% | 4.7x $29 MSRP | — |
| 20 | OP-15 Adventure on Kami's Island | $112from Feb 25 | $98 | -12.5% | 3x $32 MSRP | — |
| 21 | OP-16 The Time of Battle | $220from Apr 27 | $150 | -31.9% launch | 4.6x $32 MSRP | — |
Start price is each set's value on Jan 7, 2026 unless a "from [month]" note shows a later date. "launch" tag = tracked from actual release. vs MSRP = current market price divided by the official Japanese launch MSRP (¥4,752 box for OP-01–03, ¥5,280 for OP-04–EB, ¥5,500 for PRB) — an honest since-launch multiple, though the current figure is the international/eBay market price while MSRP is Japanese retail. Reprints = count of dated reprint records we found; Bandai does not publish per-set reprint announcements, so these come from retailer/distributor listings (see each set page). A dash means none on record, not "never reprinted."
FAQ
What is the OPBOX Index?
It is a free equal-weight index of 18 Japanese One Piece Card Game booster boxes, based to 100 on January 7, 2026. Each day it averages every constituent box's price relative to its January 7 value. As of 2026-07-18 it is 157.4 — up 57.4% since January. Sets first tracked after that date (OP-02, OP-15, OP-16) are shown individually but excluded from the index.
What is the Opening Meter?
It counts how many One Piece cards were newly graded by PSA each week — a proxy for how fast sealed product is being opened. In the week of 2026-07-08, 17,526 cards were graded. Rising grading volume while box prices hold is the supply-burn pattern sealed collectors watch for.
Why is the change measured 'since January', not since launch?
Our daily price tracking began in January 2026. Only a few sets (currently OP-16) were tracked from their actual release, so for every other set we honestly label changes 'since January' rather than claiming a launch-to-now figure we did not measure. For a true since-launch comparison we use the 'vs MSRP' column, which divides the current price by each set's official Japanese launch MSRP.
How many times has each set been reprinted?
Bandai does not publish per-set reprint announcements for the One Piece Card Game, so a definitive count does not exist. What we can show is dated reprint evidence from retailers and distributors (e.g. MediaWorld and other Japanese shops listing 再販 batches with ship dates). The 'Reprints' column counts those dated records; a dash means none were found in our sources, not that a set was never reprinted. Each set page links the sources.