Coming soon

About This Game

Before You Know It, You’ve Mastered Japanese History

Historically accurate combinations are stronger—learn history to win.

This game is a Japanese History × Deckbuilding Roguelike.

The more you play, the more knowledge you gain—until you naturally understand historical flow and cause-and-effect relationships.

Example: Public Land System → Shoen Estate Combo

"Taika Reform" → "Handen-Shuju Law" → "Konden Einen Shizai Law" → "Development of Shoen Estates"

Causal Combos — Historically Accurate Chains Are Powerful

Use cards in historically accurate sequences or relationships to trigger powerful [Causal Combos].

The deeper your understanding of historical context and causality, the stronger your deck becomes.

Example: Oda “Tenka Fubu” Combo

"Battle of Okehazama" → "Battle of Nagashino" → "Incident at Honno-ji"

Example: Hideyoshi Centralization Combo

"Sword Hunt" → "Land Survey" → "Kokudaka System"

Example: Sonnō Jōi Ideology Combo

"Rangaku" → "Kokugaku" → "Mitogaku"

The more you know, the more advantage you gain. The more you play, the more you learn.

• Deckbuilding Roguelike: High replayability with different cards and routes every run.

• Branching maps, shops, and events—your decisions determine victory.

• Historical Heroes: Each hero has a unique starting deck and strategy; new heroes unlock as you clear runs.

• From Asuka to Bakumatsu: 200+ cards and 100+ combos let you experience historical flow through your deck.

• Players who love deckbuilding roguelikes

• Players who enjoy history-themed games

• Players who want to learn while playing

• Players who want gaming time to also become study time

Before you know it, you’ll be knowledgeable—so go ahead and play.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

For this game, generative AI is used as an auxiliary tool in some parts of development and production.
It is used to create rough drafts of some of the images, text, and localization ideas used on the store page and in-game.
Final acceptance, editing, and quality checks are handled by the developers, and the content is released only after being confirmed for accuracy and appropriateness.
Please note that no content is generated in real time in response to player input within the game.