I came across this project in the Nikkei newspaper a couple days ago. It's still in the testing stages, but shows some promise. Apparently they are aiming for a more large-scale test application by 2020.
excerpt:
http://iopscience.iop.org/article/10.1088/1742-6596/507/3/032035/pdf
First test application, at the RTRI facility in Kokubunji:
http://www.japanfs.org/en/news/archives/news_id034359.html
Second test application, on the Izu Hakone Rlwy (first success on an operational rail line):
http://www.railjournal.com/index.php/asia/superconducting-electrification-wires-on-test-in-japan.html?channel=540