There is no universal “best” One Piece booster box. This guide uses OP-16 “The Time of Battle” as a current, verifiable buying example from our Tokyo shop: its regular and Damaged Box variants are listed on our site, it carries a 127-card-type set with two Secret Rare cards, and its rarity breakdown is documented by the official product page.
“Best” in this guide means ranked by what you can actually verify before you buy: set size, rarity tiers, chase-card slots, and what’s currently listed — never by price. This piece walks through OP-16’s structure card-type by card-type, names the chase cards you’re opening packs for, and points you to the exact listings, including the regular box and the discounted Damaged Box variant.
OP-16 “The Time of Battle” is a 127-card-type set (126 cards + 1 DON!! card) released in Japan on May 30, 2026, with 6 cards per pack and 24 packs per box. Its top chase tier is two Secret Rare cards — Portgas D. Ace and Marshall D. Teach — plus Super Parallel versions of the “Three Admirals” (Borsalino, Sakazuki, Kuzan). It’s currently listed at ¥12,360 (~$78) (update: currently sold out — restock requests via Quick Order), with a discounted Damaged Box currently listed at ¥11,400 (~$72).
Yen figures below convert at ¥159/USD (September 2026). Prices are a September 2026 store snapshot — check the linked listing for the current figure before ordering.
How We Rank “Best” — By Structure, Not Price
There’s no shortage of opinions online about which One Piece box is “worth” opening. This guide sidesteps that entirely and ranks by three things you can check for yourself before you buy:
- Set structure — how many card types are in the set, and how they’re split across rarity tiers, taken from the official product page.
- Chase-card tiers — which cards sit at the top of the printed rarity system (Secret Rare, Treasure Rare, Super Parallel), not which cards are trending.
- Listed availability — whether the box is actually sealed and listed for sale right now, rather than a set that isn’t currently stocked.
Against those three criteria, OP-16 “The Time of Battle” is the current example covered here because both its regular and Damaged Box listings can be checked directly and its rarity structure is documented. This is a scoped buying guide, not a ranking of every One Piece set ever released.
Inside OP-16 “The Time of Battle”: Full Rarity Breakdown
OP-16 released in Japan on May 30, 2026, with 127 total card types — 126 playable cards plus 1 DON!! card — and introduced six new Leader cards to the game. Here’s the full rarity breakdown from the official Bandai product page:
| Rarity | Card count |
|---|---|
| Special Card | 6 |
| Treasure Rare | 1 |
| Leader Card | 6 |
| Secret Rare | 2 |
| Super Rare | 10 |
| Rare | 26 |
| Uncommon | 30 |
| Common | 45 |
| DON!! Card | 1 |
Add those up and you get 127 card types — the number quoted on the official product page and the same number in our stats bar above. The two highest print tiers, Treasure Rare and Secret Rare, sit at just 1 and 2 cards respectively, which is why they’re the cards this guide focuses on next.
The Secret Rare Chase Cards: Portgas D. Ace and Marshall D. Teach
OP-16’s two Secret Rare (SEC) slots went to Portgas D. Ace and Marshall D. Teach. Secret Rare is the printed tier immediately above Super Rare in the One Piece Card Game’s rarity system; the official checklist contains two SEC cards and one Treasure Rare.
For the pull-odds side of these two cards, we’ve already published a dedicated breakdown — see our OP-16 pull rates and best cards guide, which is our own site’s analysis rather than an official Bandai figure. The official product page confirms the rarity tier and card count; it doesn’t publish per-box pull odds, so we’re not restating any percentage as an official number here.
Want the complete 127-card list with every code and rarity, not just the top tier? Our OP-16 full card list covers all of it.
The Super Parallel Tier: The Three Admirals
OP-16’s alternate-art treatments feature the “Three Admirals” named in our own coverage of the set: Borsalino, Sakazuki, and Kuzan. These are Character cards; they should not be described as Leader cards or treated as a single base-rarity group.
Together with the Treasure Rare and the two Secret Rares, the Super Parallel trio creates six named chase cards in this overview: one Treasure Rare, two Secret Rares, and three Super Parallel cards across a single 127-card-type release. Our pull rates guide provides further set-specific context without treating estimated odds as official guarantees.
Pack and Box Structure: What’s Inside a Sealed Box
A sealed OP-16 box contains 24 booster packs, each holding 6 cards — 144 physical cards per box, drawn from the 127 unique card types listed in the breakdown above. That pack-and-box structure is confirmed on our own OP-16 product listing: “24x Booster Packs: Each box contains 24 booster packs with 6 cards per pack,” matching the official 6-cards-per-pack spec from Bandai’s product page.
One Piece Card Game itself is published by Bandai and first launched in Japan on July 8, 2022; OP-16 is one of the later mainline expansions in that line-up. If you want the wider context of how the game’s numbered sets and starter decks fit together, our One Piece Trading Card Game hub is the place to start, and our OP-17 vs OP-16 box buying guide compares this set’s structure against the following release.
Which One Piece Box to Buy from Our Shop
For the OP-16 listings covered here, the practical decision is between the regular sealed box and the lower-priced Damaged Box variant of the same product.
Per our own site’s standard definition, a Damaged Box is an “unopened booster box… discounted because of damage to the outer box and shrink wrap (e.g., dents, scratches, crushed corners, or torn shrink wrap). The cards inside are unaffected.” OP-16’s Damaged Box listing is graded Damage grade A — “minor cosmetic damage to the outer box, such as small dents or scuffs.” The 144 sealed cards inside are the same product described in the breakdown above; only the outer packaging differs. Our OP-16 Regular vs Damaged Box guide is a full head-to-head on this exact comparison, and our One Piece Damaged Box lineup guide covers how this variant works across other sets.
View Product → (update: currently sold out — restock requests via Quick Order)
The regular sealed box is currently listed at ¥12,360 (~$78) (update: currently sold out — restock requests via Quick Order), and the Damage grade A variant is currently listed at ¥11,400 (~$72). Both contain the same 24-pack, 127-card-type structure covered above, including the same odds at the two Secret Rares and the Super Parallel Three Admirals. Browse the wider category in our One Piece card box collection, or use Quick Order to build a mixed order across multiple listings in one checkout.
Frequently Asked Questions
What is the best One Piece booster box to buy right now?
There is no universal best box. If your criteria are a documented 127-card-type structure, two Secret Rare cards, and a live Japanese listing, OP-16 “The Time of Battle” is one current option. It’s currently listed at ¥12,360 (~$78) (update: currently sold out — restock requests via Quick Order).
How many cards are in an OP-16 booster box?
A sealed box has 24 packs of 6 cards each, 144 physical cards total, drawn from 127 unique card types (126 cards plus 1 DON!! card) in the set.
What are the rarest cards in OP-16?
The top printed tiers are 1 Treasure Rare and 2 Secret Rare cards — Portgas D. Ace (OP16-118) and Marshall D. Teach (OP16-119) — followed by the Super Alt-Art Super Rare parallels of Borsalino, Sakazuki, and Kuzan, part of OP-16’s 10-card Super Rare tier.
What’s the difference between the regular OP-16 box and the Damaged Box?
Both contain the identical sealed cards and pack structure. The Damaged Box is graded Damage grade A for the outer box and shrink wrap only — minor cosmetic issues such as small dents or scuffs. See our Regular vs Damaged Box guide for the full comparison.
When did OP-16 release in Japan?
OP-16 “The Time of Battle” released in Japan on May 30, 2026.
Where can I buy One Piece booster boxes from Japan?
We ship sealed Japanese One Piece product from Tokyo. Browse our One Piece card box collection or use Quick Order for a mixed order across listings.
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