Roppyakken ('Six Hundred') is a Japanese Hanafuda game for 2 or 3 players. Unlike many Hanafuda games, which may last a dozen rounds, Roppyakken tends to be over in less than 3 hands due to its scoring system.

Some unique characteristics of the game include its usage of the Rain Man as a wild card and its treatment of the Bush Warbler card as a de-facto Bright card.

Roppyakken was also introduced in Korea after World War II, and Koreans developed own scoring rules and variants. In Korea, the game is called 'Yukbaek' or 'Sambong'.

Hanafuda images by Louie Mantia Jr. and Hwatu images by Marcus Richert are used under Free Art License 1.3, which is compatible with CC BY-SA 4.0 license.

Hwatu sound effects by JICA (Jeonju) are used under Korea Open Government License Type 1.