High Speed Train will run through Hakodate?
https://trafficnews.jp/post/128282/2
(Summary)
Even after full opening of Hokkaido Shinkansen, passengers will have to change trains at Shin-Hakodate Hokuto to local or rapid train.
But, based on the plan on the article, by track-laying
for high speed train between Hakodate and Shin-Hakodate Hokuto, 3 car train uncoupled at Shin-Hakodate Station from 10 car train bound for Tokyo will be able to run through Hakodate Station.
(Summary ends)
I think the plan would be feasible. But, it can cause train reduction of the existing local and rapid trains.Considering suburban transportation, existing local and rapid trains would also be important. So, this plan should be done carefully.