The Shironeko Project Trading Card Game is a Japanese collectible card game published by Colopl Toys in May 2017, based on the mobile role-playing game Shironeko Project (White Cat Project), which Colopl released in July 2014 and which became one of Japan's most popular mobile titles. The TCG was supported by a steady stream of booster pack releases, with Volume 1 titled Journey to Adventure and subsequent volumes introducing new characters and mechanics tied to major story updates in the mobile game. The game features characters, monsters, and settings from the mobile game's fantasy world, with a mix of well-known characters such as Mio, Pan, and Yoshio appearing across sets. Starter decks and single booster packs were distributed through major Japanese hobby retailers and import shops. The game was discontinued after several volumes, leaving it out of print. Colopl became embroiled in a significant patent lawsuit with Nintendo in 2018, which ultimately resulted in a settlement; the card game had already wound down before those legal matters concluded.
Source: boardgamegeek.com/boardgame/389775/shironeko-project-trading-card-game