Hanafuda Yuukyou Den: Nagareban Oryuu

Hanafuda Yuukyou Den is, as you guessed, a Hanafuda playing card game for the
Famicom. It is based on the Koi-Koi style of play. Basically, you play with
picture cards, and the objective is to make pairs and combinations known as
"yaku", which is how you ultimately score points. As with many such games in
the era, this one involves scantily clad women, who you get to see more of as
you win more and more. Nonetheless, the Hanafuda card game is fun and a bit
different than the usual cards you know, so I would recommend trying it out!