On the Topic of Noah...

Of the Biblical names, Noah is definitely one of the most easily recognized. Although his role in the Bible was short, what he accomplished is known across the globe, even to most non-Christians: he was chosen by God to repopulate the Earth after God decided to flood the planet for its sinful ways. To this end, Noah gathered his family and a pair of each animal species, and boarded them all upon a wooden ark that weathered the flood that covered the world.

From what we know of Noah in Pachinko, we can't yet say that he is a savior or anything of the sort, but there are still some parallels we can draw between Noah and his namesake. In the Bible, the reason that Noah was selected to carry on life was that he was a paragon of devotion and piety. Funnily enough, although Noah in Pachinko outright states his skepticism that God exists, he is known to be intelligent and generally unproblematic. 

As stated earlier, the main point of Noah's story Biblically was that he was selected to survive a purge, and in doing so he brought along animal life to survive too. Although not a 1-to-1, the reason that Sunja's family survives the tail end of WWII is that Hansu, the benefactor of her family, wants Noah to survive, being that he is Hansu's sole male heir. 

Alternatively, the fact that Noah survived in the first place could be a parallel to his Biblical self, being that he was one of the survivors of a number of decades that saw the mass death and cultural genocide of Koreans. Of course, this interpretation doesn't fit particularly well, being that in Pachinko, Noah is one of many Koreans who survived, and, culturally, Noah seems to prefer Japanese mannerisms and ethics.

I believe that the brunt of Noah's parallel will come later in the novel, in that he may bring his entire family out of Japan and back to Korea. I think this to be a probable outcome, given that Noah is shown to be academically successful, backed by the wealthy and influential Hansu, while still maintaining a close relationship with his family. Plus, it would be weird for a book described as a "four generation saga of Koreans" to end in Japan after having a large chunk of its story in Japan.