O Cão Ortros (2009)

Both explore the consequences and morality of changing the natural order of pain, life, and death.

The main characters are similiar and the story is rather similiar. Orthros also has an almost supernatural element like HTE does.

That's the most I can say without giving away spoilers.

Those two dramas...taste the same, I should say.

In Ouroboros, two childhood friends choose different paths to avenge a loved one: one a path of light, the other a path of darkness. They are compaired to an Ouroboros, two dragons biting each other's tail, symbol of eternity and harmony of light and darkness.

In Orthros no Inu, two men are connected by a mysterious bond: one is a good man cursed with the power to kill by one touch, the other is a criminal blessed with the power to heal with one touch. They are compared to Orthros Dog, a two faced dog, one good, one evil, bound together by destiny.

The main characters are similiar and the story is rather similiar. Orthros also has an almost supernatural element like HTE does. That's the most I can say without giving away spoilers.

They both have a similar theme, not necessarily good vs. evil but they ask the same question "What is good? What is bad?"

See some People possessing powers~

Both dramas has characters who have supernatural powers. Orthros has Healing/Killing hands, while Nanase has the more typical powers of premonition, telekinesis etc.

Supernatural powers, the government wanting to take advantage of this powers. Two opposite supernatural powers: read memories vs erase memoeia for the Memorist. In Orthros no Inu is killing vs reviving.
And something else that should be kept as a surprise.

Both dramas are about a man with a "godhand", although Orthros no Inu is less medical and more suspenseful where it explores more of the other side of such power - that such a hand, as much as it can give life, can also take life. Both are interesting form their respective perspectives.

Both are about two dark characters with superpowers, battling, trying to kill each other.............

Both are about two dark doctor rivals, one healer, one killer. Both are based on famous manga......................