Lost in Blue Mobile: Marina & Riku Edition Preserved—A Milestone in Konami’s Survival Kids Legacy

Konami’s lost classic, Lost in Blue Mobile: Marina & Riku Edition, has resurfaced thanks to the determined efforts of the feature phone preservation community.

This original title in the long-running Survival Kids franchise not only deepens the legacy of Lost in Blue but also highlights the cultural and historical value of Japan’s early mobile gaming industry—an area often overshadowed by console releases. Originally debuting on i-Mode compatible phones in 2008, Lost in Blue Mobile: Marina & Riku Edition offered a fresh narrative in the beloved survival series.

Unlike its Nintendo DS counterpart, which introduced gamers worldwide to the challenges of surviving on a deserted island after a shipwreck, this mobile spin-off centered on two new protagonists: Marina and Riku, plane crash survivors navigating an isolated island fraught with mysteries, natural disasters, and a unique threat—an enigmatic creature called the Chupacabra. This mobile game formed part of Konami’s Survival Kids series, which traces its roots to the Game Boy title released in 1999.

The franchise has since seen numerous iterations, including the acclaimed Lost in Blue for Nintendo DS in 2005, and more recently, Survival Kids (2025) for the anticipated Nintendo Switch 2.

Notably, Lost in Blue Mobile: Marina & Riku Edition was one of three Japan-exclusive mobile adaptations, each originally distributed through Konami’s now-defunct DX Net portal as part of a monthly subscription service.

The first two entries were reimagined versions of past favorites, but this particular edition stood out with its entirely new story and characters. After Konami shuttered Konami Net DX in 2016, Lost in Blue Mobile: Marina & Riku Edition was presumed lost, a fate common to many Japanese feature phone games.

However, a breakthrough arrived when @frigamarrymepls successfully preserved the i-Mode version, as confirmed by noted feature phone archivist RockmanCosmo.

The preserved version is now playable via the DoJa 5.1 SDK emulator, easily accessible on the Keitai World Launcher—a pivotal moment for game historians and fans alike. RockmanCosmo notes that while the mobile title carries the Lost in Blue branding, its gameplay aligns more closely with the original Survival Kids games for the Game Boy, utilizing a top-down 2D interface rather than the DS’s distinct mechanics.

This preservation not only allows broader access to a rare Konami release but also draws attention to the vital work of communities such as the Keitai Wiki Discord.

Dedicated volunteers continue to track down, emulate, and share these early gems from Japan’s mobile past. Lost in Blue Mobile: Marina & Riku Edition’s recovery underscores the importance of digital preservation, especially for lesser-known mobile games that rarely reach Western audiences.

As the Survival Kids series continues with new releases on modern hardware like the Nintendo Switch 2, the successful rescue of this unique mobile chapter celebrates both Konami’s innovation and the passion of the preservationist community.

Konami Nintendo Milestone Xbox Series X|S Nintendo DS DS Blue Marina Survival Kids mobile Lost in Blue Nintendo Switch 2 i-Mode EZ Web Yahoo Keitai DX Net Konami Net DX DoJa RockmanCosmo frigamarrymepls Keitai Wiki Keitai World Launcher