Изумрудный Кокон: Мастера Покров и Миры Миньонов

is a role playing video game developed by Genki exclusively for PlayStation. The game combines elements of role playing video games and virtual pet management. It was developed by Genki in collaboration with Katsuya Kondō, character designer for the Studio Ghibli movies Kiki's Delivery Service and I Can Hear the Sea.

Jade Cocoon is set in a world where most of the land is covered in dense forest and populated by bizarre, mostly bug like monsters called Minions. The only safe havens are small villages, one of which is the home of the protagonist, Levant. Levant is a young Cocoon Master, whose job is to capture and purify Minions. The Minions can then be used to fight and defend Levant, spun into silk for money, or fused with other Minions to form more powerful combinations. As Levant captures more minions, his "Capture Level" increases, allowing him to capture monsters more easily. Fused minions take on physical characteristics of both their parent creatures, allowing the player to customize their appearance and abilities. Each minion has a collection of elemental attacks which can be passed from generation to generation. Strategy generally follows a rock/paper/scissors pattern (Wind beats Earth beats Water beats Fire beats Wind), as each wild Minion has an element (although fused Minions may have more than one).

After the main story is completed, the player may continue to play the game in a new area called The Eternal Corridor, which consists of a near infinite area where new monsters that were unavailable in the main game can be found. Those areas are randomly generated "rooms", which are made of straight paths, occasionally dividing into two paths. Only one route leads to the end of the room. Once the player finds the "end" of the room they proceed to the next in the corridor. These randomly generated "rooms" supposedly go on indefinitely. There are wild Minions residing in the Eternal Corridor. Their experience level increases as the player progresses through the corridor. This continues on and on thus making it harder to progress through the corridors. There are also boss like Minions that can drop special "skins" to be applied to the player's Minions. Those skins have no purpose other than cosmetic. The player can also have access to new items and equipment. However, the player is unable to access other areas in the game, and can become stuck in the corridor forever (hence it is recommended to keep a separate save file for this).

In April 1999, the US release of Jade Cocoon, still in its alpha stages, was previewed in Next Generation as part of its "NG Alphas" series. The following months, Jade Cocoon was previewed in the Game Informer magazine twice, in issues 73 and 75, then reviewed after release in issue 76. It was then reviewed in the September issue of NextGen. A month later, the game was previewed in the 21st issue of Official U. S. PlayStation Magazine, then later reviewed in the 23rd issue, and featured on the issue's demo disk along with demos for Final Fantasy VIII, 3Xtreme, Tiny Tank, Macross VF X2, Centipede, You Don't Know Jack, and Ultimate 8 Ball. A few months later, it was also reviewed in the 53rd issue of Official UK PlayStation Magazine, and featured on its demo disk.

Jade Cocoon was re released on the PlayStation Network for PlayStation 3 and PlayStation Portable in June 2008 in Japan, but not in other regions. It was released the same day as Crash Team Racing and other games.

A mobile phone direct sequel, titled , was released in 1999 in Japan. It continues the story from the end of the game. A sequel, Jade Cocoon 2, was later released for the PlayStation 2 in 2001. The game takes place 100 years after the original, and changes a substantial number of elements, retaining only certain recurring characters and core concepts.