Second prize is "We've tried to make Odaka (小高作ってみた@ja)" unique engneering activity with real time POS data from actual store in Odaka Fukushima prefecture.
"R" from RESAS!
Almost APIs from the private companies will end this April except the inbound data from NTT docomo.
Inbound by prefecture in Japan - src on GitHub
Try to get APIKEY of RESAS-API and access inbound data from NTT docomo!
My photo as open data