In 1942, a lieutenant paymaster in Japan’s Imperial Navy named Yasuhiro Nakasone was stationed at Balikpapan on the island of Borneo, assigned to oversee the construction of an airfield. But he found that sexual misconduct, gambling and fighting were so prevalent among his men that the work was stalled.

Lieutenant Nakasone’s solution was to organize a military brothel, or “comfort station.” The young officer’s success in procuring four Indonesian women “mitigated the mood” of his troops so well that he was commended in a naval report.

Lieutenant Nakasone’s decision to provide comfort women to his troops was replicated by thousands of Imperial Japanese Army and Navy officers across the Indo-Pacific both before and during World War II, as a matter of policy. From Nauru to Vietnam, from Burma to Timor, women were treated as the first reward of conquest.

We know of Lieutenant Nakasone’s role in setting up a comfort station thanks to his 1978 memoir, “Commander of 3,000 Men at Age 23.” At that time, such accounts were relatively commonplace and uncontroversial — and no obstacle to a political career. From 1982 to 1987, Mr. Nakasone was the prime minister of Japan.

Today, however, the Japanese military’s involvement in comfort stations is bitterly contested. The government of Prime Minister Shinzo Abe is engaged in an all-out effort to portray the historical record as a tissue of lies designed to discredit the nation. Mr. Abe’s administration denies that imperial Japan ran a system of human trafficking and coerced prostitution, implying that comfort women were simply camp-following prostitutes.