More Counties for Japan

A lightweight CK3 map expansion adding historically grounded counties to Japan.

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This mod expands Japan with additional counties to improve regional detail, historical flavor, and campaign variety without overcomplicating the map.

Built for immersion-focused playthroughs and compatibility with Japan-centered setups.

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• Izumi (Kinai)
• Awa (East Bandō)
• Iga (Tōkaidō)
• Shima (Tōkaidō)
• Wakasa (Hokurikudō)
• Sado (Hokurikudō)
• Iki (North Saikaidō)

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County and title data are based on:

• Nova Monumenta Iaponiae Historica (NMIH)

The goal is to maintain historical credibility while fitting CK3 gameplay structure and balance.

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• Adds new counties to key historical regions
• Improves map density and regional identity
• Seamlessly integrated into existing duchy structures
• Lightweight and performance-friendly
• Designed for compatibility with Japan-focused mods

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• Works with vanilla gameplay
• Mostly compatible, except with other mods that modify the map.
• No gameplay mechanics altered

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• Japan campaigns
• Historical roleplay
• Players who prefer denser county layouts
• East Asia–focused mod lists