Professional Mahjong Gokuu is a mahjong game released in Japan for the NES. While details on the game's specific features are scarce due to its regional exclusivity and age, it can be assumed that gameplay follows standard mahjong rules and conventions prevalent at the time.  This would involve drawing tiles, discarding tiles, forming sets (pungs, kongs, chows), and aiming to complete a winning hand.  The visuals would likely consist of simple tile representations and a basic interface.  The game's developer and precise release date information are also largely unavailable, leaving it somewhat obscure amongst the vast library of NES titles. The 'Gokuu' in the title possibly suggests a theme or character related to the popular Japanese legend of Son Goku.

Professional Mahjong Gokuu (Japan)

Pro Yakyuu Satsujin Jiken! (Japan)