What is missing?

Here’s my next thought for the day,
let’s see if you can think of what I think is “missing” in these photos from the country side in Japan.
Well, not that it had to be there, just something I usually expect to see when riding a train, and something that was even existing in Ambrym (an island in Vanuatu! and no, I do not refer to coconuts bc I’m not used to see coconuts everywhere )
Green fields and …….