The Changhai Commandery(蒼海郡) is Logical Fallacy. Russian invasion of Ukraine motivates me to write this essay to remind you the history of Northeast Asia. Once, built up enough ways and means, every dictator took military force to subjugate the neighbors. Ukraine and Russia are similar to Korea and Japan in terms of cultural history. Wei Toyotomi Hideyoshi (豊臣 秀吉,1537 – 1598) of Japan used the word [정명가도 征明假道; provide us the road to China] and invade Korea…..