South Korean President Moon Jae-in has put more than 50 million won (around $41,000) of his own money into a fund investing in firms looking to replace Japanese suppliers, his office said Monday, as the Asian neighbours remain locked in a bitter trade dispute. It was the first-ever stock market investment by Moon, a former human rights lawyer whose economic policies critics blame for slowing growth in the once-booming South. Tokyo imposed restrictions on exports crucial to tech giants such as Samsung following a series of South Korean court rulings ordering Japanese firms to pay for forced labour during World War II.