While we were on the topic of trains which will soon be retired, here are two that are out of service today, that I got to see in 2016. These are the 700 Series and the E4 Max Series.
The E4 Max, which stands for "Multi Amenity eXpress", was the second and so far last double-decker high-speed type operated by JR East, and was withdrawn in 2021. With a top operating speed of 240 km/h, they were mainly used on the Jôetsu line between Tôkyô and Niigata. They featured some "commuter" class rooms with 3+3 seating, and two E4 Maxes coupled together could carry a total of over 1600 passengers, the highest capacity for a high-speed service.
But of course, all people will talk about is the very distinctive conk. I didn't take as many pictures of trains at the time, so I didn't walk around to get a better view of this unique vehicle.
The original 700 Series was the first Shinkansen model that JR Tôkai and JR West cooperated on, for joint service on the Tôkaidô and San'yô lines between Tôkyô, Ôsaka and Hakata. Combining knowledge acquired by each company with the 300 and 500 Series, it has formed the basis of new models since then.
To be precise, the 700s which are now retired are the white and blue, 16-car sets, withdrawn in March 2020. Covid caused the cancellation of the type's celebratory final run on the Tôkaidô line. Eight-car trains painted in grey and branded "Hikari Rail Star" can still be found on the San'yô Shinkansen, as well as JR West's Doctor Yellow inspection train (JR Tôkai's set was recently retired).