Once again, on my many adventures to find nooks and crannies in which to stuff goodies in, I come across this cave, shrine and marker that made me wish I knew how to read Kanji. If I were to guess, it's a memorial dedicated to one of the many caves in which Japanese soldiers hid during World War II. So again, to any Oki-cachers who've got the knowledge, please impart. Domo arigato gozaimasu.
Of course, this has to be a multi, because I know for sure I can't drop anything in that cave, but if you turn left and follow the wall until there's none left, let your geosenses guide you and you'll find it.
UPDATE: So if I had looked for the sign that said what this was (like Ms. longwayrounders did like a smart person) instead of assuming this was some historical landmark that remained unidentified despite the fact that it's out in the open in a fairly populated area, I would have wrote THAT story in the beginning.
Congratulations to IH8TIX for his first FTF. I'm honored that it was my cache.
Ybbx ybj.