
Second Sengoku
Second Sengoku: A New Dawn for Hearts of Iron IV
A Divergent Path for Japan
Prepare to experience a radically altered historical timeline in Hearts of Iron IV with the Second Sengoku mod. This extensive modification plunges you into an East Asia where the Tokugawa Shogunate managed to secure a victory in the Boshin War. However, this triumph was not a path to modernization, but rather a slow, agonizing decline. Internal strife, economic collapse, and a devastating natural disaster lead to widespread unrest and the fragmentation of Japanese society. By 1930, the nation is once again embroiled in conflict, ushering in a new era reminiscent of the Sengoku Jidai, a period of warring states.
Key Features and Mechanics
Second Sengoku offers a wealth of new content designed to immerse you in this unique alternate history. The mod introduces a brand-new map focused on East Asia, featuring nineteen distinct nations, each with their own ambitions and struggles. The country selection screen has been completely reworked to reflect these changes.
At the heart of the mod’s innovation lies the “World Stage” mechanic, allowing players to engage with an off-map Second World War, influencing its outcome without direct participation in every theater. Beyond this, Second Sengoku introduces several gameplay-altering mechanics:
- Engaging siege warfare to conquer fortified territories.
- Battalion limits to add a new layer of strategic resource management.
- A revamped religion system that impacts national unity and foreign relations.
- Hundreds of new national focuses, unique ideas, and historical laws to shape your nation’s destiny.
- A fresh visual experience with new focus icons, national flags, country names, color schemes, and character portraits.
- A custom user interface and title screen to enhance immersion.
- Additional ideologies and political parties reflecting the fractured political landscape.
Dive into a World of New Possibilities
Second Sengoku transforms the familiar landscapes of Hearts of Iron IV into a battleground for a nation teetering on the brink. Will you guide a resurgent clan, a socialist movement, or an ultranationalist faction to power? The fate of Japan, and potentially the entire East Asian region, rests in your hands. This mod offers a deep and engaging experience for players looking for a fresh take on the game’s strategic depth and historical what-ifs.

