lawdy...history is replete with awfulness all you and such books do is ask that you keep staring at one spot of it. HYPE.
Koreans as you may recall were occupied by Japan for 35 years and committed many of the same atrocious things that China would experience including attempts to eradicate Korean culture.
Meanwhile books have been written on how Japan advanced Korea into the modern nation. Sorry but history is not a zero sum tabulation of GDP vs. human rights.