Storm Emeralda is the new Japanese Pokemon TCG set built around Mega Rayquaza ex, releasing July 31, 2026. The reason it is everywhere right now: Amazon Japan opened an "invite-request" pre-order on June 19 that turns a normal pre-order into a lottery you have to apply for.
Quick context if you are new to it. The Pokemon Trading Card Game is the physical card game, the one with booster packs and chase cards, separate from the video games and from the phone app Pokemon TCG Pocket. Storm Emeralda (ストームエメラルダ) is the next MEGA-era Japanese expansion, and its mascot is Mega Rayquaza ex. It drops as part of the franchise's 30th anniversary year, which is a big deal for collectors who have wanted a modern Rayquaza set for years.
The chase card is Mega Rayquaza ex. That is the one everyone is hunting, and it is the whole reason the set is hot. A Japanese booster box holds 30 packs, and the box is the unit Amazon put up for the lottery.
Here is the concrete trigger. On June 19, around 2pm Japan time, Amazon Japan listed the Storm Emeralda booster box under its "invite-request" system. You do not just add it to your cart. You need a free Amazon Japan account, you tap "request an invitation" on the product page, and then you wait to see if Amazon invites you to actually buy. The purchase cap is one box per person. Scarcity built in, on purpose. Posts about it blew up on X almost immediately, with overseas buyers asking how to make a JP account and whether they need a proxy address to ship out of Japan.
Is it free? No. This is a paid physical product. Booster boxes are tracked around the ¥6,000 range by resellers, though The Pokemon Company has not posted a final retail price yet. Treat any number you see as a guide, not a receipt.
My honest take on the invite system: it is a fairer shot than a pure first-come refresh war, but it does not kill scalping. The one-box cap slows bulk buyers, yet the same scarcity that protects you also feeds the flip market the second boxes ship. If you actually want to open packs, request the invite and be patient. If a "guaranteed" box shows up at triple price before launch, that is the resale machine, not a deal.
Why it's blowing up right now
Three things hit at once: a beloved chase card in Mega Rayquaza ex, the 30th anniversary spotlight, and an Amazon lottery that made people feel they had to act today or miss out. Search interest in ストームエメラルダ spiked hard on June 18 and 19, right as the reveal landed and the invite-request went live. The set releases in Japan on July 31, 2026, and the English version, renamed Delta Reign, follows on November 6, 2026. So if you miss the Japanese lottery, the English print run is your next shot. Watch for the official card list and price to fill in the blanks before then.