Both set in the end of the warring era, but each represents the opposing view to the other. It is great to watch the different point of view and understand that era better. Justice vs Survival & strength!
Almost the same period from the two sides.
Korean and Japan
Very epic and historically truthful.
Watch too
King Gwanggaetto the great
The dream of emperor
Gye baek
The three with deep roots
You will understand Korean history and Mr Sunshine
Both depicts the tale of the legendary and honorable Samurai Uesugi Kenshin.
While Tenchijin focus more on his successor Uesugi Kagekatsu, Heaven and Earth focus more on Uesugi Kenshin himself, from his rise to power to the iconic duel with Takeda Shingen.