User talk:Randy
From Jcastle.info
Omine Castle near Nagano https://www.google.com/maps/place/%E5%A4%A7%E5%B3%B0%E5%9F%8E%E8%B7%A1/@36.6755599,138.1747504,776m/data=!3m1!1e3!4m5!3m4!1s0x601d87409bdf96b5:0x12b1fa6dbc36032f!8m2!3d36.6759506!4d138.1762598?hl=en
My pictures: https://www.flickr.com/photos/tags/ominejou
It seems to be a concrete rebuilt castle (mainly the main tower). The doors were not locked and the sight over Nagano was great.