After the academic conference ended, Chen Yu also set off for Tokyo, but he didn't choose to use "Necromantic Space" to return to Tokyo; he still opted for the Shinkansen train.
From Kyoto to Tokyo, traveling by plane takes roughly just over an hour, and the Shinkansen is slightly slower but doesn't cause much delay. Plus, he found the scenery along the train route more interesting.
Like other modes of transportation in Japan, the Shinkansen was very quiet as well. Even if people were talking, they kept their voices low. Chen Yu almost felt sleepy due to the sunlight coming in through the train window.