The paper on VX, used in the 2017 assassination of Kim Jong Nam, the exiled half brother of North Korean leader Kim Jong Un, in Malaysia, was written jointly by Anthony Tu, honorary professor at Colorado State University. It was published in a digital edition of the Japanese journal Forensic Toxicology on Monday.
In the murder, assailants are believed to have smeared two less toxic substances on the victim's face and mixed them in order to generate VX, the paper said.
The method is different from a technique to produce VX by mixing substances that was developed by the U.S. Army, according to the paper.
Pointing to three VX attacks committed by Aum in Japan between 1994 and 1995, the paper warned that the possibility that toxic nerve agents such as VX will be used in future terror attacks must not be ignored.
News On Japan - Nov 26
Panicked passengers on a Shinkansen bullet train were evacuated at a central Japan station on Friday night, after a plastic bag containing suspicious liquid was found onboard.
Reuters - Nov 26
Japan detected the first case of highly pathogenic H5-type bird flu this season at a poultry farm in the south of the country, public broadcaster NHK reported on Saturday.
News On Japan - Nov 25
Inui Street, the famed autumn walk within the Imperial Palace in central Tokyo, opened to the public from Saturday.
News On Japan - Nov 25
Tofukuji Temple, home to 2,000 maple trees and renowned as one of Kyoto's premier autumn hotspots, features the Tsutenkyo Bridge, and the breathtaking 'sea of autumn leaves'.
News On Japan - Nov 24
The amount of undeclared income by wealthy people in Japan has reached a record high of 98 billion yen, among the worst offenders being scrap gold wholesalers, breeders and yakiniku restaurants, the National Tax Agency announced on Friday.
Total Film - Nov 24
After hitting the big screen in its native Japan on November 3, Godzilla Minus One is about to make its way overseas – and it's a hit with international critics.
News On Japan - Nov 23
Russians continue to be the worst offenders among cars with foreign diplomatic number plates when it comes to not paying off parking fines in Japan.
News On Japan - Nov 23
As Kyoto's autumn foliage reaches its peak, swarms of tourists have converged on the ancient capital, captivated by stunning displays like Wednesday evening's illumination at Kiyomizu Temple.