The service I used was the super express from Osaka to Tokyo (about 550km) which can arrive at Tokyo in 2 hours and 30 minutes at a max speed of 300kph. It costs about $150 for an adult.
This is the inside of the car. The seats are a bit larger than usual economy class of airplanes. Those seat has reclining function with arm rests.
Vending machines of juices and foods are seen in some corners in the cars. Even flushing toilets and powder rooms are available.
After the comfortable trip to Tokyo I arrived at a hotel where the wedding party were held. The Tokyo terminal is located near the hotel so that's why I took the bullet trains.
Here is the bouquet flowers the couple gave me as a present.