Read up about Nishimura a lot back when that >Jim is going to kill 8ch copypasta thing was going around. Here's some information on him:
Some of Nishimura's history:
https://archive.is/CJrEx
>(2013) as the community grew, some users took the option of registering fee-paying accounts with the site, known as “● accounts”. But now news of a massive data leak has surfaced, meaning that the personal information of these customers is no longer private, with their real names, e-mail addresses and credit card details being among some of things that are now in the public domain
https://archive.is/ydAeM
>(2014) Through this internal strife, the existence of a paid service to delete postings of 2channel was uncovered on April 2, by a sudden announcement from Hiroyuki's business partner, Mr Uchiyama, Hotlink, Inc's president.
https://archive.is/nZkpw
>(2014) An anonymous discussion board 2channel ( http://www.2ch.net ), the biggest website in Japan, with 230 million page views a day ,has been the target of fierce cyberattack ( DDoS, DNS poisoning, and so on.) every single day since April 13 2014. The self acclaimed offender is, astonishingly, the founder and ex-manager of the website Hiroyuki Nishimura (Hiroyuki created a clone of 2ch, 2ch.sc, when he lost ownership which used a bot to scrape posts from original 2ch and effectively DDOSed the site)
Also https://archive.is/d2K03 (2ch chronicles) is worth reading as well to learn about the history of 2ch and Hiroyuki. Also >>>/newspaper/3