The Ninja Master was revealed to be the father of Alex Kidd.

(Introduced in the last wave of Sigma 6 figures as "Dark Ninja Master"; before the series and corresponding toy line was canceled.)

To access it, the player must complete the first round of Shinobi III: Return of the Ninja Master, without using a continue.

He avoids several lethal traps and twisting passages to meet his old foe, the Ninja Master.

The theme tune to Ninja Master is exactly the same as theme tune of The Master.

The gameplay itself is largely the same as that in Shinobi III: Return of the Ninja Master.

At Ninja Mountain, The Ninja Master could see that something was terribly wrong in the world.

The Ninja Master knew none of this yet... though he knew that something must be done and made it his unbreakable oath.

The Ninja Master was hesitant to send his last two, but he knew the fate of the world would lie in their hands.

Hiro was found as an infant by the Ninja Master and might become the greatest ninja ever.