First one will be under the desk beside your starting tank, 2nd on top of the middle wall. And the third will be under the desk on the right.

2 on the bottom floor after you drop from the conveyor belt

Bottom floor of the blue room

top floor

follow the conveyor belt

break the wall at the start of the conveyor belt

go on top of the blue building, and you can jump to this ramp and get the 2 sitting on here

Follow the lights up from the hole in the wall you just broke

jump down from the last light and follow the conveyor belt

take the light fixture to the bridge or the entrance of the room on the right, then go up the ladder

after going up the ladder go across the bridges and there it is

back track to the bridge but now go through the correct door and look up.

after turning on the conveyor belt, be ready to jump while riding it

hard to miss, after falling through the trash chute, its sitting on top of the garbage

ride up the sticky wall and use your double jump to reach this one, or jump backwords after doing the stairs and use your double jump

keep a eye open for the next set of sticky walls and look up, the sushi is hiding in the corner

Final one for this section is at the top of the stairs go left

depending on how you got in here, you may have missed the vents like me, after using the axe to disarm the security system, look up on each side, there will be a piece of sushi.

Go through the opening in the wall and explore the maze, there are 2 pieces hidden in there, Ones on the bottom floor and another is on the top floor.

To the left after you enter, on top of the shelf

2 in the opposite washroom you use to flood the building