Original sentence: In Japan, NHK refers to the TV channel and broadcasting corporation, Nippon Hōsō Kyōkai, while in USA, NHK stands for Nippon Hikikomori Kyokai which means "The Japanese Hikikomori Association", an attestation to the protagonist's claim of a subversive conspiracy led by NHK (the broadcasting corporation) to create NHK (the hikikomori group)
Edited sentence: In Japan, NHK refers to the TV channel and broadcasting corporation, Nippon Hōsō Kyōkai, but here, NHK stands for Nippon Hikikomori Kyokai which means "The Japanese Hikikomori Association", an attestation to the protagonist's claim of a subversive conspiracy led by NHK (the broadcasting corporation) to create NHK (the hikikomori group)