VOICE:
https://aivoice.jp/character/kotonoha/
https://aivoice.jp/product/kotonohaen... (English ver.)

character picture:
blueberry san(https://seiga.nicovideo.jp/seiga/im59...)

OSM:
http://www.openstreetmap.org/copyright

Twitter:
  / japanroute43  

niconico:
http://www.nicovideo.jp/user/92164945

niconico-channel:
https://ch.nicovideo.jp/nikkohken