The Man Who Challenged 8,000,000-Koku (1961)

A story of an orphan boy who wanted the love of parents so badly, another orphan sincerely pitied him to the point he gives his secret birthright as an illegitimate son to a Shogun as a "gift of hope" to the sad boy. As the orphan boy grew up, his loving heart became bitter and he saw the opportunity to take advantage of this birthright with the help of a man who wanted to use this orphan's desire to be loved, for seizing power in the shogunate by using the imposter. Many obstacles to hurdle along the way of deception, however, will they succeed or will he be exposed?

Unfortunately the movie The Man Who Challenged 8,000,000-Koku is not yet available on HBO Max.