Hissatsu Shigoto Nin is another Japanese NES game requiring further research to fully detail its gameplay, storyline, and development information. Due to its Japanese-only release and limited documentation in English, specific details about the game are scarce.  The title hints at a potential theme involving ninjas or stealth action.  Discovering the developer and publisher would require looking into Japanese game release records and archives.

Hissatsu Shigoto Nin (Japan)

Hiryuu no Ken III - 5 Nin no Ryuu Senshi (Japan)