Hello Kitty Shinkansen, which operates between Shin Osaka and Hakata, debuted on June 30.
It seems like people in the world are really excited about it.
The official website is here.
According to the website, the bullet train is only one train, Kodama No.730 (east band) and Kodama No.741 (west band). It seems like the bullet train departs from Hakata in the morning, turns U-turn at Shin Osaka and goes back to Hakata.
I am going to Hiroshima next week, but I cannot get on the train.
I think this bullet train is for foreign tourists.