In addition to all the Sound! Euphonium locations I visited I also took some pictures inside the Keihan trains that runs between Chūshojima Station and Keihan Uji Station that was shown in the show. The trains in the show is the Keihan 13000 series EMU trains. There's also Keihan 10000 series EMU trains running on this section, but they don't match.
Image from S1E1 - 14m24s
Closeup of the train seats.
Image from S1E1 - 14m32s
Better view of the left side of the seats.
Image from S1E2 - 18m35s
Full inside view of the train car.
Image from S1E6 - 20m39s
Image from S1E7 - 18m52s
Another view of the whole train car.
Image from S1E7 - 19m13s
If you look closely, you can see the same ads on the train doors as in the anime.
Image from S1E9 - 06m32s
Right side of the train seats.
Image from S1E9 - 08m27s
Seats on both sides of the door.
Image from S1E11 - 08m23s
Haikyuu ad in this picture.
Image from S1E13 - 01m23s
The sides of the seat is the same.
Image from S1E13 - 01m40s
Closer look at the doors.
No location map since it's just Keihan trains running between Chūshojima Station and Keihan Uji Station.
This location was visited on 2015/11/04 and 2015/11/05.
Special thanks to the ones who went here before: