Across my online studies I've come across several vague references to the 1970s Katanga Infanticide, in which the Japanese government arranged the killing or secret abortion of hundreds of children born to Congolese mothers and Japanese miner fathers.

Why is this atrocity not more well-known, if it happened so recently? Has the Japanese government ever admitted to or in any way acknowledged these killings or accusations? What was the contemporary reaction to the Infanticide?

As the only references to this event are an unsourced wikipedia page and some very biased blogs, I feel compelled to ask: did the Katanga Infanticide actually happen?