Looking at the LIVE CAM at Fukushima it appears the big stack is tilting to the right.
To check we did a screen grab and put grid marks on the image using Paint.
Red box is computer-squared so it has no error in straightness. The up and down line on the right half of the image is next to a tall wall to demonstrate if the camera is tilted or not. The camera does not seem to be askew. The blow-up image is at the bottom – click on it for full size.