This is the Okinawa Terrain set that you will need for my Attack on Shuri Castle 1609 scenario, which will be available soon. It is basically the Japanese Green terrain set, with some changes to allow the distinctive red and white striped Shuri Castle courtyard be depicted.
This will only work if you have updated your version of Sengoku Jidai to at least the 1.2.8 patch, that added the capability to have extra terrain styles.

How to Install:
1) Download the file:
http://www.mediafire.com/file/n8vli4xws ... a.rar/file
2) Extract the file:
3) Within the file you have extracted you will find two sub folders;
Data; Copy and paste the Data file into your ProgramFiles (x86)/Slitherine/Sengoku Jidai (Steam version: /ProgramFiles (x86)/Steam/SteamApps/Common/Sengoku Jidai). Click OK to overwrite any existing files.
ORIGINAL OBJECTS; This contains the Original Sengoku Jidai Object Texture files. As the Data file overwrites the original Object Texture files, I have included them here just in case you want to revert back to them.
4) Unlike the standard terrain options (Ukiyo-e and Green) this additional terrain set cannot be selected from the in-game Options screen. So find your Sengoku Jidai OPTIONS.TXT file. Mine is located in My Documents/My Games/SJIDAI, but yours may be different depending upon what version of Windows you have. Open the OPTIONS.TXT and change the AltTiles line to read AltTiles 20.
Cheers
Paul