How could a ninja beat a steel armored elite samurai?

A ninja could potentially defeat a steel-armored elite samurai by leveraging agility, stealth, and the element of surprise. Using superior speed and agility, the ninja could evade direct confrontations and target vulnerable points in the samurai's armor, such as joints or openings. Additionally, employing stealth tactics, distractions, or traps could disorient the samurai, giving the ninja an opportunity to strike decisively. Ultimately, the key would be to outmaneuver and outsmart the heavily armored opponent rather than engage in a straightforward battle.