However, the general definition of crimes against humanity includes murder, extermination, enslavement, deportation and other inhumane acts committed against civilian populations, and persecutions on political, racial or religious grounds, whether or not in violation of the domestic laws of the country where perpetrated. Anyone who has a role in planning, organizing, or instigating the aforementioned acts should be held accountable.

In this sense, Japan's use of forced labor and the coerced recruitment of what it euphemistically calls "comfort women", namely the women and girls forced into sexual slavery to serve the Japanese military during WWII, and its illegal use of chemical or biological weapons are all crimes against humanity that were overlooked in postwar trials and should be re-examined today.

The issue of the women forced into sexual slavery by Japan was first raised at the United Nations by a civilian group in February 1992 and a Special Rapporteur was tasked with checking the issue. In her 1998 report, the UN's Special Rapporteur Gay J. McDougall concluded, "the Japanese Government remains liable for grave violations of human rights and humanitarian law, violations that amount in their totality to crimes against humanity. The Japanese Government's arguments to the contrary, including arguments that seek to attack the underlying humanitarian law prohibition of enslavement and rape, remain as unpersuasive today as they were when they were first raised before the Nrnberg war crimes tribunal more than 50 years ago."

Despite all the evidence, including first-hand testimonies, and the condemnation of the international community, Abe publicly declared that there was "no evidence" that women had been coerced into sexual slavery when he first became prime minister in 2006. Now, in office for the second time, Abe has said he intends to review the 1993 Kono Statement, which expresses remorse to former "comfort women".

Abe is certainly not reticent when it comes to showing his revisionist streak, but his worrisome rhetoric denying Japan's war crimes against humanity and its liabilities, and his step-by-step but relentless efforts to revise the Constitution and rearm Japan, have dragged Japan into an abyss of disgrace. A real danger to the international community as well as Japan looms large as Abe's words and acts mirror those of war-time politicians of militarist Japan.

So far this year, Abe has visited India, the Middle East and Africa as part of his diplomatic strategy, but while this may have succeeded in increasing the business opportunities for his country, he has not won any sympathy or repaired the damage he has caused to Japan's image in the international community with his denials-of-the-truth posturing. He never will unless he truly repents.

The author is a researcher with the Institute of Modern History at the Chinese Academy of Social Sciences.