Will appreciate advices if this is feasible.
I had read up the alpine website and refered to their timetables.
They have advice 6 - 8 hrs from Tateyama to Ogizawa but I can only spare 5 - 6 hrs.
Using JR East Pass, travelling on a Sat in June.
From Shibuya to Toyama, reach Toyama at 1015am, catch the rail from Tentetsu Toyama at 1037am and reach Tateyama Stn at 1131am
Complete whole alpine trip and reach Ogizawa by 5.55pm. Catch last bus to Shinano-Omachi and then train back to Shibuya.