I'm not a Japanese poster but from what I know January is generally where the mid season ice show takes place. The first week of January usually kicks off with a team competition as a New Year tv special (Japan Super Challenge) followed by the Nagoya skating festival the day after.
The JSC show stopped last year while the Nagoya fest still went on, as the Nagoya skating festival has a much longer history, but it seems that there is no Nagoya festival scheduled in Jan 2016 as well.
The SOI tour is generally held in January other than the Olympic year, this year (as in 2016) it's been pushed back to April but we have the newly added New Year on Ice (both are IMG ice shows).
Ice shows scheduled for Jan 2016:
Jan 9 - NHK Trophy Exhibition (Yuzuru, Mao)
Jan 16, 17 - New Year on Ice (Yuzuru, Shoma, Satoko)
Jan 23, 24 - Prince Ice World (Shoma, Dice, Kanako)
* I've only listed the senior skaters that are actively competing for Japan
I don't really see JSF pushing back the nationals any time soon. And for Yuzuru even he can get a bye from nationals, I suspected he will still want to participate and defend his national champion title. I think this is a pretty big deal for the Japanese skaters.
So all I can hope for is that he learns from this experience and continue to improve his conditioning strategy. And perhaps JSF can fight for an earlier GP date for NHK in 2017!?