And not thick enough to be those of the Nomonhan ribbon. You are seeing, in my opinion, photographic artifact - the blending of the colors, showing as a solid blue band, more consistent in width with China Incident than Nomonhan. The two shades of blue do not show as two distinct colors, only one.
Also, reds and yellows in that photo actually seem to reproduce as reds and yellows for the most part - are you telling me that the prominent, red band down the middle of that ribbon is NOT red or that somehow the gold band on the Nomonhan ribbon is showing as red? I suppose it is possible, but I doubt it.
And speaking of precedence, why exactly is the Manchurian Incident medal to the right of the Showa Enthronment medal? I thought these were worn in the order in which they were received? At least in other photos I've seen, the Showa Enthronement medal preceeds the Manchurian Incident medal. Perhaps precedence totally escapes me, but I thought national awards were simply worn in the order received by date, with few exceptions? I make no claim to fully understand this, but I don't know how useful your observation is here.
Now, if you tell me that he NEVER received a China Incident medal, then color me wrong!