I always hated the fact that you had to convert to Christianity in order to build The Pirate Ship, the Nanban Trade Ship, and European Cannons. So I made a mod that allows such units to be built.
You now have the option to create a Military Port or Nanban Trade Port if your clans religion is Buddhism. I'm not sure if Ikki Ikko fall into this category. If they don't, great. That was my intention. If they are allowed to build Nanban Trade Ports, more the merrier I guess. However that was not my intention because they should not be allowed according to their religion.
Keep in mind that once you select the Nanban Trade Port that you have reached the buildings highest upgrade level. If you receive an event message letting you build another Nanban Trade Port, continue as normal. If you convert to Christianity, you may continue as normal and upgrade a Nanban Trade Port to a Nanban Quarter as usual.
Compatibility:
Campaigns: Shogun 2
DLCs: I'm not sure if this will be compatible with the Otomo Clan DLC, but I'm pretty sure it will be. This mod only adds a new building to Buddhist Clans. I've never played a Christian campaign, but my understanding is that Christian Clans area allowed to build The Black Ship. If I'm wrong please let me know. I can then add The Black Ship to the Christians.
MODs: Should be compatible with any Mods. Just let me know if you need me to add this to your mod. Feel free to use this for any community mods and what ever else you would need this for.
New Changes:
If you decide to adopt Christianity, your Nanban Ports will produce units with higher XP, thus still trying to keep some balance to the game. When building Clan specific units, like the Hojo European Cannon, from either Buddhist or Ikko Nanban Trade Ports will produce units with a level 1. No matter which clan, Christian Nanban Port produces level 2 units and the Christian Nanban Quarter produces level 4 units.
Imported Matchlock Ashigaru - Trade Port
European Cannons - Nanban Trade Port
Hojo European Cannons - Nanban Trade Port
Bow Kobaya Ship - Nanban Trade Port
Bow Kobaya Ship Mori - Nanban Trade Port
Siege Tower Bune Ship - Nanban Trade Port (Originally Ikko Ikki does not have the ability to recruit The Siege Tower Bune. I have now enabled it)
Medium Bune Mori Ship - Nanban Trade Port
Nanban Trade Ship - Nanban Trade Port
Mori Nanban Trade Ship (aka Galleon Caravel) - Nanban Trade Port
The Black Ship - Pirate Fortress
Instructions:
This Mod is a MOVIE format. Just place this MOD and encyclopedia folder in to your game's data directory and play the game. You do not need to add this to you user.script.txt file.
C:\Program Files (x86)\Steam\steamapps\common\total war shogun 2\data
or
C:\Program Files (x86)\Creative Assembly\Total War Shogun 2\data
References
Download Link: Nanban Recruit Mod v2.2