The Japanese Pokémon TCG “Single Strike Master” (set S5I) booster box is a Sword & Shield era expansion released in January 2021 that centers on the powerful Single Strike style. Its dynamic foil box art features Single Strike Urshifu delivering a fierce punch amid swirling red energy, perfectly capturing the set’s aggressive, one-hit theme. Inside the sealed box are 30 booster packs (five cards per pack), each offering the chance to pull rare Single Strike-themed cards – including Ultra Rares like the first Japanese printings of Single Strike Urshifu V and VMAX – along with other high-value cards. As a Japanese release, this booster box showcases unique holofoil patterns and card artwork not seen in the English sets, making it highly prized by collectors completing their Sword & Shield collections or by players seeking exclusive Single Strike trading cards. The factory-sealed condition ensures authenticity and collectible value, making this box ideal for Pokémon TCG fans and deck-builders alike.