Which Japanese booster box should you buy?

The 6 Japanese booster boxes we stock, side by side: what each set is about, its chase cards, how big it is and who it suits. For every Japanese set ever released, see the full set list.

Mega Dream ex (M2a)

Part of the Mega Evolution High Class Pack run, with Mega Dragonite ex as its mascot. This is the set that introduced the "Mega Attack Rare" rarity, and it runs a dense secret-rare tail with guaranteed-ex packs throughout.

Set code: M2a
Japanese release: 28 Nov 2025
Cards in the set: 193 base cards, 250 with secrets
In the box: 10 packs, 10 cards per pack
Best for: Mega Evolution & competitive players

Chase cards: Mega Dragonite ex MUR, Mega Gengar ex SAR, Mega Charizard ex MA

See the Mega Dream ex booster box · Mega Dream ex card list

Mega Symphonia (M1S)

Launched alongside Mega Brave as its companion set. Mega Gardevoir ex is the mascot here, and Mega Latias ex is in the set too.

Set code: M1S
Japanese release: 1 Aug 2025
Cards in the set: 63 base cards, 92 with secrets
In the box: 30 packs, 5 cards per pack
Best for: Psychic-type players & Gardevoir collectors

Chase cards: Mega Gardevoir ex MUR, Mega Latias ex SAR

See the Mega Symphonia booster box · Mega Symphonia card list

Mega Brave (M1L)

Mega Symphonia's companion set, released the same day. Mega Lucario ex is the mascot, and the artwork leans into courage and strength with vivid, lightning-charged visuals.

Set code: M1L
Japanese release: 1 Aug 2025
Cards in the set: 63 base cards, 92 with secrets
In the box: 30 packs, 5 cards per pack
Best for: Fighting-type players & Lucario collectors

Chase cards: Mega Lucario ex SAR, Lillie's Determination SAR, Mega Venusaur ex SAR, Mega Absol ex SAR

See the Mega Brave booster box · Mega Brave card list

Ninja Spinner (M4)

A stealth-and-precision themed set drawing on traditional ninja lore, mascotted by Mega Greninja ex. The palette stays shadowy throughout: deep blues, blacks, silver and red.

Set code: M4
Japanese release: 13 Mar 2026
Cards in the set: 83 base cards, 120 with secrets
In the box: 30 packs, 5 cards per pack
Best for: Greninja chasers & high-volatility speculators

Chase cards: Mega Greninja ex SAR, Cinccino ex SAR, Mega Dragalge ex SAR, Mega Floette ex SAR

See the Ninja Spinner booster box · Ninja Spinner card list

Abyss Eye (M5)

An underwater-themed set built around deep-sea and abyssal Pokémon, rendered in dark blues, silvers and bioluminescent greens. Mega Darkrai ex is the mascot, and by average card value, this has been one of the stronger-performing recent Mega Evolution era releases.

Set code: M5
Japanese release: 22 May 2026
Cards in the set: 81 base cards, 118 with secrets
In the box: 30 packs, 5 cards per pack
Best for: Underwater-theme fans & Mega Darkrai chasers

Chase cards: Mega Darkrai ex SAR, Morpeko ex SAR, Mega Zeraora ex SAR, Gwynn SAR

See the Abyss Eye booster box · Abyss Eye card list

Storm Emeralda (M6)

Follows Abyss Eye in the Mega Evolution era, headlined by Mega Rayquaza ex, whose signature attack scales with Fire and Lightning Energy in play. It includes two-part Stadium cards.

Set code: M6
Japanese release: 31 Jul 2026
Cards in the set: 76 base cards, 113 with secrets
In the box: 30 packs, 5 cards per pack
Best for: Rayquaza collectors & early adopters of a brand-new release

Chase cards: Mega Rayquaza ex MUR, Talonflame ex

See the Storm Emeralda booster box · Storm Emeralda card list

Buying a Japanese box from us

Every box is checked in Belfast before it is listed. Before yours ships, we email you photos of the exact box, and if it ever turns out resealed or fake, you get a full refund including postage. Read our guide to buying Japanese Pokémon cards in the UK.