Ginga no Sannin, a Japanese NES title, is likely an adventure or RPG that follows a plot centered around three characters (as implied by "Sannin"). Specific details about the game's history, developers, and gameplay are scarce. It probably featured a storyline and challenges particular to Japanese storytelling traditions of the era. Further investigation would be necessary to identify the publisher and to find more information.

Ginga no Sannin (Japan)

Ginga Denshou - Galaxy Odyssey (Japan)