I don't think much of what it written in that article is up for debate? You can check his wikipedia page for example:

https://en.wikipedia.org/wiki/Shinzo_Abe#Political_positions...

"Abe is affiliated with the openly ultranationalist organization Nippon Kaigi (Japan Conference). He is considered a right-wing populist and ultra-conservative within the LDP, and some media and books have referred to him as a far-right politician"

There were also numerous scandals during his tenure, most of which were not widely reported outside Japan... but, an example is:

https://en.wikipedia.org/wiki/Moritomo_Gakuen

"In March 2018, it was revealed that the finance ministry (with finance minister Tarō Asō at its head) had falsified documents presented to the parliament in relation to the Moritomo Gakuen scandal, to remove 14 passages implicating Abe."