So i'm watching some old New Japan. I'm seeing a lot

From the wiki. Throughout its history, Global Force Wrestling has worked with several international wrestling promotions, with championships from those promotions sometimes having been defended at GFW events. Among the organizations GFW has worked with are Mexico's Consejo Mundial de Lucha Libre (CMLL), Japan's Inoki Genome Federation (IGF), New Japan Pro-Wrestling (NJPW), Wrestle-1 (W-1) and America's Evolve Wrestling.[120] TNA's relationship with NJPW lasted from 2008 to 2011, and included TNA sending wrestlers to participate in NJPW's annual Wrestle Kingdom event, as well as NJPW sending future IWGP Heavyweight Champion Kazuchika Okada on a training excursion to TNA; however, the relationship soured in 2011, when IWGP Tag Team Champions Team 3D were held off of a New Japan tour in favor of appearing on Impact Wrestling and Okada was given a Green Hornet-inspired gimmick.[121]

On March 2, 2014, TNA collaborated with Wrestle-1 in producing the Kaisen: Outbreak supershow in Tokyo, Japan where three TNA championships were defended. In May 2015, it was reported that the relationship between TNA and Wrestle-1 had ended.

GFW also had a working agreement with Mexico's Lucha Libre AAA World Wide (AAA).

In February 2017, Impact Wrestling established a new working agreement with Japanese promotion Pro Wrestling Noah.

On March 24, 2017 it was announced that Impact Wrestling has formed a partnership with television station ITV in the United Kingdom to bring World of Sport Wrestling back on the air in the UK, after a thirty-year hiatus. http://impactwrestling.com/impact-professional-wrestling-noah-partnership/

TNA pissed off New Japan because it kept burying their guys

Final straw was booking an IWGP Tag Title change without consulting New Japan