Testing of an eco-friendly, battery-powered bus prototype began on the 19th. If you keep your eyes peeled, you may see this Yoka ECO Bus running around town.
– Kirk
P.S. You can see a Japanese report with video here:
http://www3.nhk.or.jp/lnews/kumamoto/20180119/5000001342.html
http://www.greencarcongress.com/2018/01/20180119-kumamoto.html