His bankai is an extension of his shikai. Instead of revolving around optical illusions, his bankai turns his inverse world into a reality. Anyone in its AOE will be force to fight inverse and landscape itself will be upside down.

What if, instead of just inverting space in multiple ways, the bankai creates this perpetual spinning of what the brain perceives to be the outside world: like seeing the world from inside a barrel that's rolling and turning down a hill at a dizzying pace. It would be understandable why Shinji would refrain from using an ability like this if it indeed affects him as well (I think we have reason to believe that Sakanade does this as he whiffs the fumes during his duel with Aizen). How about Fish in a Barrel? Is that like Sakana-something?

-The inversion of oncoming assaults so that the subject perceives it to have occurred, or made contact, when in fact the assault has not even taken place or produced any sort of effect. It counter-strokes reality, in a sense, which may go on to indicate how Burner Finger 3 did not instantly kill all 4 targets as it came crashing down from high altitudes and seemingly enveloped them. What we saw was Bazz-B's perception of the lava hitting the captains; he could have perceived it to have happened (After involuntarily taking a whiff of Sakanade+) by being under its influence and not produced any fire at all despite going through all the motions. It's a very expectations vs reality kind of scenario, granted.

A castle or fortress that traps the enemy and optically inverts either constantly or at Shinji's will, disorienting the target's senses, equilibrium and footing. Inversions would also be hazardous, taking bizaar or sharp shapes like a puzzle of booby traps. The only way out would be to defeat shinji and use his sword as a key to exit the fortress, activate certain camouflaged switches in a particular order, or overcome the fortress or shinji with your reiatsu. *Dimensional manipulation-can shift the y, x and z axis’s of reality.* *Instead of inverting opponent's sight, it inverts the motor functions of their movements with Shinji's manual control. For example, when they want to use their right hand/arm, they use their left hand/arm or one of their legs instead. When they want to flashstep, their legs may cramp.

expands his manipulation of senses and its range, and doesn't descriminate between friend of foe except himself this way kubo can come up with a reason as to why shinji didn't go bankai as it will affect everybody in the vacinity..... everything is inverted..... not only perception but also the way an opponent thinks lols

-Sakanade physically deconstructs the earth and sky and switches them over and over again, like the turning of an hourglass, in a way similar to Typoon's Disintegration from FF7 until deactivated.

1st Officer, Divine General of the East, Tenjirou Kirinji
2nd Officer, Divine General of the South, Kirio Hikifune
3rd Officer, Divine General of the West, Ouetsu Nimaiya
4th Officer, Divine General of the North, Senjumaru Shutara

It says that when he(Shunsui) was little, he was injured in a fight with Ukitake and Yamamoto took him somewhere to be healed. And he kinda says that Kirinji's water techniques are nostalgic, so he's implying that Kirinji healed him, yeah.

Shunsui: "even though it's always hard to ask the royal guards for help, but from the beginning, my new dress has been helped by Senjumaru san...that order.......nah, nevermind ."

Kurotsuchi Mayuri:
This man(Shinji) lacks a sense of distance, he always has. I hate how he barges in whenever he feels like it.