I was just looking at the graphic of the new Micro Ace products, including the two E10s, numbers 3 and 5. 5 was (apparently) assigned to Maibara at some point. Was it there only to help trains between Shin-Hikida and Tsuruga?
https://en.wikipedia.org/wiki/JNR_Class_E10
E10-2 is preserved at Oume Rail Park