i think the name 'ogino' is wrong,
'sano' is correcttakaharu station(高原駅)-sano(狭野)
8:24-8:31/12:29-12:36/16:29-1636/18:09-18:16
sano-takaharu station
8:43-8:50/12:43-12:50/16:43-16:50/18:23-18:30
http://www.town.takaharu.lg.jp/web/tenki/bus2.htm
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Kito-line,Takaharu station time-table
upper:for Miyakonojo(都城)
lower:for Kobayashi(小林)
http://www.jrkyushu-timetable.jp/cgi-bin/jr-k_time/tt_dep.cgi?c=28859
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as this map,
http://www.town.takaharu.lg.jp/web/kankou/out_tozan.htm
sano --- sano shrine --- oujibaru park --- takachiho-no-mine around 4h?
takachiho-no-mine --- takachiho-gawara-visitor center 1h?
Takaharu-town-tourist-association
0984-42-4560
Oujibaru-park
0984-42-3393
Takachiho-gawara-visitor center
0995-57-2505
maybe nobody can speak english...