As the highest authority in Soul Society, the decisions made by Central 46 could not be disputed even by the Captain-Commander of the 13th Division.
Therefore, even though Genryūsai Shigekuni Yamamoto was certain there were many suspicious points in the soul disappearance case, he could only obey Central 46's ruling.
Even though he was deeply dissatisfied with Central 46's decision to dispose of the eight Hollowfied captains, he could only endure it and do nothing.
Because once he acted, it would amount to betrayal.
So, Genryūsai Shigekuni Yamamoto decided to do nothing. When Central 46 arrested Kisuke Urahara and the others, he did nothing; when Yoruichi Shihōin rescued Kisuke Urahara and the others, he still did nothing.
Only after hearing that Kisuke Urahara and the others had fled to the Living World did he unhurriedly dispatch the Punishment Corps of the 2nd Division to pursue them.
Anyone with eyes could tell that it was just for show.
Yoruichi Shihōin had been the former commander of the 2nd Division's Punishment Corps. Sending her underlings to arrest their former boss—wasn't that ridiculous?
Of course, the sages and judges of Central 46 saw that as well, but they could find no flaw in Genryūsai Shigekuni Yamamoto's actions and could only tacitly accept them.
Most importantly, they did not dare push the 13th Division too hard. After all, it was Seireitei's strongest military force, and taking things too far would benefit no one.
Thus, Central 46 tacitly accepted the fact that Kisuke Urahara had left Seireitei with those Hollowfied Bleach. The soul disappearance case came to a perfect close, and everyone was happy.
As for Aizen, the instigator behind the whole affair, he did not come out to cause any more trouble.
After all, he had only just pinned the blame on Kisuke Urahara.