The full article on the impeachment proceedings against Judge Okaguchi are now outside the paywall. 

As expected, it demonstrates that the impeachment court decided after deliberating for just three hours. Even though several members of the court wanted to deliberate further, they were told a decision had to be made right away, possibly because if there was further delay Okaguchi would have retired and be unimpeachable. Four of the twelve members of the court (all Diet members)  voted against impeachment.

While not in the article, one of the interesting things about this impeachment is that even though the reasons for doing so were mostly things that he had already been disciplined for by the judiciary (including punishment by the Judicial Status tribunal of the Supreme Court), the Supreme Court reportedly was  not a complainant who initiated the proceedings. This is odd because by the judiciary has a statutory duty to report "bad" judges to the impeachment tribunal, and virtually all other impeachments resulting in removal appear to have been initiated by the Supreme Court.