TOKYO - A bitter feud is tearing one of Japan's wealthiest families apart, with tit-for-tat lawsuits filed as accusations of blatant racism fly.

Mr Han Chang-woo, 89, founder and chairman of Maruhan, a leading operator of pachinko (slot machine) parlours across Japan, has sued Ms Marina Haba, 51, the eldest of his six children for the return of a loan of 480 million yen (S$6.2 million), with interest.