It was a two part question. N_2 said the US did not help the Japanese rebuild, but we did help Europe. He then went on to call this racist. I do believe we did help Japan rebuilt after WWII.
I found the following:
time.com/time/asia/2006/heroes/nb_macarthur.html
General Douglas MacArthur
Victorious in battle, he went from soldier to statesman, and created a new Japan from the ashes of war
By Jim Frederick
The task of reconstructing Europe after World War II was divvied up among the handful of victorious nations. But in the Pacific, the job of rebuilding Japan fell, effectively, to a single man: U.S. General Douglas MacArthur. And for five-and-a-half years, the Supreme Commander for the Allied Powers ruled from his office at the Dai-Ichi Life Insurance Building in central Tokyo with an imperiousness to make emperors blush as he sought to transform Japan from a theocratic military dictatorship into a liberal capitalist democracy. It was an exercise without precedent and, more than half a century later, it remains the most successful postwar reconstruction in history. Despite formidable flaws, MacArthur was a compassionate conqueror, a wise administrator and, more than anyone, the man responsible for setting Japan down the path toward becoming the free, fair and prosperous economic superpower it is today.