Humans first arrived in east Asia 2.1 million years ago, and modern humans arrived there at least 80,000 years ago. The fertile crescent civilization formed about 11,000 years ago, and some flood accounts, as well as some geological evidence, date the floods at about 12,000 years ago.
The modern humans that went to Asia largely stuck to the cost, and started on that route some millennia earlier than the modern humans that settled the Levant. Pre modern humans took that route far earlier, and there's growing evidence our ancestor and cousin species preceded them on it.
