OP-17 World's Strongest Warrior: Set Guide and JP Prices

OP-17 世界最強の戦士 (Sekai Saikyou no Senshi, The World’s Strongest Warrior) landed in Japan on August 22, and two weeks later the Japanese price lists have settled enough to be worth reading. It’s a 131-type set plus 4 DON!! cards at ¥240 a pack, the ceiling is the 4th-anniversary pirate-crew Super Parallels at seven figures, and the two headline Secret Rares — Rocks D. Xebec and Loki — were sitting at ¥3,480 and ¥2,480 with copies actually on the shelf. Here is the whole ladder, with the yen attached.

What’s in OP-17 World’s Strongest Warrior?

131 card types plus 4 DON!! cards, sold in 6-card packs at ¥240 including tax, released August 22, 2026. Bandai publishes the rarity split as a spec line on the official product page, and it adds up exactly.

The set is the game’s fourth-anniversary booster and it runs on two hooks. One is Elbaf and the kingdom of Warland, which brings the new leader OP17-079 Monkey D. Luffy — the card Bandai’s own page features as a スーパーリーダーパラレル (Super Leader Parallel) — plus OP17-119 Loki and the Straw Hats in Elbaf gear. The other is the Rocks Pirates, headed by the new leader OP17-039 Rocks D. Xebec and the Secret Rare character card OP17-118 under the same name. The Four Emperors get Super Parallel treatments on OP17-005, OP17-022, OP17-062 and OP17-112.

If you’re deciding between the Japanese print and the English one, we ran that math separately in OP-17 Japanese vs English; the English release was August 28 at $4.99 a pack. This article assumes you’ve already decided you want the Japanese cards.

How much do OP-17 singles cost in Japan right now?

Anywhere from ¥50 to ¥1,480,000, checked at yuyu-tei (遊々亭) on September 5, 2026 — but the median item on the list is ¥120 and 125 of the 177 items are ¥500 or less. The useful number isn’t the ask on its own. It’s the ask next to what the same shop pays to buy the card back.

All figures read off yuyu-tei’s /sell/opc/s/op17 and /buy/opc/s/op17 pages on September 5, 2026, tax included. The 販売 (hanbai) figure is what the shop charges you; the 買取 (kaitori) figure is what it pays a customer walking in with that card. A private sale usually clears between the two. The mechanics of reading those mirrored pages for any card are in how to check a Japanese card’s market price.

Two things jump out of that column of percentages. The pirate-crew Super Parallels sit at 70 and 74 percent — unusually tight, which is a shop saying it wants those cards badly. And the single Treasure Rare sits at 27 percent, the loosest spread in the set.

Which OP-17 cards are the chase cards?

Three tiers, and they’re separated by orders of magnitude. The ceiling is the 4th-anniversary pirate-crew Super Parallels — EB04-061 Luffy for the Straw Hats and OP17-118 for the Rocks Pirates — which is where the entire set’s value concentrates. Buying one of every item on yuyu-tei’s OP-17 list would cost ¥3,524,210 on September 5. Those two cards are ¥2,278,000 of it, about 65%.

The middle tier is the Four Emperors Super Parallels (OP17-005 Whitebeard, OP17-022 Shanks, OP17-062 Kaido, OP17-112 Big Mom) and the OP17-079 Luffy Super Leader Parallel, running ¥99,800 to ¥248,000.

The floor of the “chase” is the part most collectors actually buy: base Secret Rares. OP17-118 Rocks D. Xebec at ¥3,480 with six copies on the shelf and OP17-119 Loki at ¥2,480 with four. Those are the two cards this set will be remembered for, and both cost less than a fifteen-pack afternoon.

Why 131 card types produce 177 different prices

yuyu-tei’s OP-17 sell page carries 177 separately priced items. The set has 131 types. The 46 extras are parallels, Super Parallels and the 4th-anniversary prints — and every one of them shares the base card’s number and, in almost every case, the base card’s rarity letter too.

That is why OP17-118 appears on the same shop page at ¥3,480, ¥7,980 and ¥798,000. Same number. Same “SEC” in the corner. Three different cards, 229 times apart in price. The printed tell is the small star above the rarity box, which we broke down card-by-card in Japanese One Piece card rarities.

The same trap runs the other direction with the Special Cards. All 10 of OP-17’s スペシャルカード are alternate-art versions of cards first printed in earlier products, and they keep those products’ numbers: OP12-056 Garp, OP13-028 Shanks, OP14-108 Rayleigh, OP16-098 Yamato, ST27-005 Blackbeard, ST31-004 Luffy, ST32-002 Oden, EB04-007 Zoro, P-084 Buggy and P-107 Gol D. Roger. Search a shop for “OP17-” and you will not see any of them, even though they only come out of OP-17 packs. They are not cheap, either — ST31-004 Luffy was ¥99,800 and OP13-028 Shanks ¥39,800 on the same list.

The other 125 cards, and what a playset actually costs

Strip out the parallels and OP-17 is a cheap set. Commons were ¥50 across the board, uncommons ¥80, and rares mostly ¥120 to ¥320. All six base leader cards — OP17-001 Edward Newgate, OP17-020 Shanks, OP17-039 Rocks D. Xebec, OP17-058 Kaido, OP17-079 Monkey D. Luffy and OP17-099 Charlotte Linlin — were ¥50 each. The base Super Rares ran ¥220 to ¥780.

Put differently: 125 of the 177 items on the list are ¥500 or less, and the median is ¥120. If what you want is the cards rather than the art treatments, singles are dramatically cheaper than packs, and you get to choose.

The buyback side is where that stops being flattering. Base SR OP17-063 Kaido was a ¥5 buyback. OP17-005 Whitebeard SR, ¥20. Most of the set has no published buyback price at all, which is a shop’s way of saying it’s bulk. That asymmetry — cheap to buy, near-worthless to sell back — is the normal shape of a Japanese set two weeks in, and it’s the reason we frame Japan as a place to buy from rather than sell into.

Second shop, same day

One shop’s list is a quote, not a market. Suruga-ya (駿河屋), checked September 5, had both OP17-118 versions out of stock in its own inventory, with marketplace sellers listing the base Secret Rare from ¥2,788 across 9 used copies and the parallel from ¥5,933 across 5 used copies.

Against yuyu-tei’s ¥3,480 and ¥7,980 for clean copies, that’s the usual pattern: the second-hand marketplace undercuts the shop’s own graded-and-guaranteed stock, and you trade condition certainty for the difference. Suruga-ya’s condition grades and yuyu-tei’s 傷無し / 傷有り split are separate systems and neither maps onto the other.

Two things we deliberately left out. Sealed box pricing: Bandai publishes a per-pack MSRP of ¥240 and no box figure, and open-market box prices move too fast to state usefully two weeks in. And the Premium Bandai lottery, which the official page dates as August 7 to August 18 — that page returns an empty document to us, so we won’t describe terms we haven’t read. The buying routes themselves, including which proxies handle Japanese card shops, are in buying One Piece cards from Japan.

Every yen figure above has September 5, 2026 attached to it for a reason. Two weeks after release is early, and the buyback side was still being revised in public on the day we checked: yuyu-tei strikes through the previous figure when it raises an offer, and 24 of the 28 Secret Rare, leader-parallel and Super Rare-parallel entries on its OP-17 buyback list carried that flag. That’s a record of a shop repricing its own risk, not a forecast. Re-read the lists before you commit; we’ll check them again.