You are not permitted to download, save or email this image. Visit image gallery to purchase the image.
The 29-test All Black was admitted to hospital in Tokyo just before Christmas and was bedridden for at least a week.
The former loose forward, who played for the Highlanders in 2008-12, had lumbar discitis - an infection in the intervertebral disc space.
He was in serious pain initially but after that subsided it was hoped he would be out of hospital in early January.
However, Thomson is still in hospital in Tokyo as he continues his recovery.
Thomson posted on social media on Monday a picture of him walking on a treadmill in hospital so he is on the mend.
But any thoughts of playing this season in Japan have evaporated.
The Japanese season is more or less finished and Thomson is believed to be heading back to New Zealand to recover fully once he gets out of hospital.
Thomson (35) had played for Canon when in Japan but switched to NEC this season. He also played for the Reds and Rebels after leaving the Highlanders.