I found this sign at one of the gusuku (castles) in Okinawa a few years back.

いっちぇ〜ならん！

      Iche~naran!

          Do not enter!

At a construction site near my apartment in Fukuoka I found this warning:

危なかけん (Abunaka-ken)

入ったら、(haittara)

いかんとばい (ikanto-bai)

工事しよるけん (Kōji shiyoru-ken)

立ち入り禁止ばい！ (Tachiiri kinshi-bai)