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Daiteikoku is a conquest-based simulation game (SLG) published in Japan by AliceSoft in 2012. It is the third game in AliceSoft's Dai series, preceded by Daiakuji and Daibanchou.

Daiteikoku box art
(c)アリスソフト Box art
Brand Alice Soft
Release date April 28, 2011
Genre / Rating SLG / 18+
Base price 8500
Voice Partial
Daiteikoku - banner
General Information
Game Mechanics
Admiral Skills
Conversation Choices
Custom Admirals

About Edit

Daiteikoku, literally translating as "big empire", is set as a space-themed epic novel and parody reminiscent of World War II. Players follow the colorful and extensive cast of characters---many of whom are inspired by figures in world history (in a style similar to a certain popular anime)---as they enact the major events which defined the World War II period alongside a slew of anime-style tropes, hijinks, and amorous interactions with the game's main protagonist.

As a full-fledged eroge, Daiteikoku features several erotic encounters between the protagonist, Tougou Tsuyoshi, and the game's female cast. (No yaoi or yuri scenes are depicted in this game.) Scenes are obtained by completing specific events and gameplay objectives. For those who wish to enjoy the game without viewing erotic content, all but a few brief occurences can be skipped simply by not selecting "H" events where available, which are clearly marked.

Daiteikoku is originally written in Japanese.

Translation Edit

The fan-driven Daiteikoku English Translation Project was established on June 23, 2011. Before its abandonment due to lack of active translators, it had reached 35% completion as per a partial release on March 10, 2012, which remains the most progressed translation to date. A number of translators have attempted to revive the project over the years, but with no published results.  

A follow-up translation effort began on September 2, 2015, three months after English publisher MangaGamer announced a licensing partnership with Daiteikoku's original publisher, AliceSoft. MangaGamer would render this project obsolete; in a post to Fuwanovel, the publisher's in-house translator, Arunaru, stated an official localization was possible at some point. 

Story SynopsisEdit

Daiteikoku synopsis image

Long before the universe united, its many planets were inhabited by small human factions. Nations were established, yet navigation to other regions in the universe—essentially making contact with others—was impossible. Such travels at the time would have required hundreds of years.

However, The Empire of Aeris soon discovered strange bodies scattered throughout the universe. Upon further research, they learned these, hence called "warp gates," enable one to instantly move from one location to another. This advancement allowed many regions, previously isolated from each other, to begin making contact—thus beginning the Age of Discovery.

Over time, major powers were established through conquests, destructions, and submissions. The current universe is the very result of this.

It is now 939 A.D, and conflicts continue. At the summit is The Empire of Aeris, the world's largest nation, still at large due to their warp gate technology. They vow to unite the universe and restore peace to the world. In contrast, The Empire of Japan—the world's oldest nation—is nearly ruined after prolonged wars with The Empire of Chun. But, unable to bear the death of the previous minister and numerous veteran admirals, the Empress (Mikado) takes drastic measures. She appoints Tougou Tsuyoshi, a renowned, unorthodox admiral, in charge of the nation's navy, which must be rebuilt from practically scratch. Mikado has an eye for potential men, and she believes Tougou Tsuyoshi has what it takes to protect The Empire of Japan.

Downloadable Content Edit

Daiteikoku's latest content update is 1.02, which adds several new features. Specifically, new gameplay enhancements enable the player to scout enemy forces before invasions, to reconstruct tech buildings, to begin a new game with collected fish ships, to perform emergency repairs, and even to create custom admirals. The game's post-release content also includes new events and ships.

Official TrailersEdit

Daiteikoku Gameplay Trailer04:06

Daiteikoku Gameplay Trailer


Daiteikoku Character Trailer05:14

Daiteikoku Character Trailer


Daiteikoku Story Trailer05:11

Daiteikoku Story Trailer


Daiteikoku OP (English Subbed)02:16

Daiteikoku OP (English Subbed)



Announced September 2012, a figurine of Mikado is announced for January 2013

A figurine of Reita Adolf was announced for July 2013

A figurine of Lertih Adolf was announced for Feb 2012

Dai SeriesEdit

Dai Series

Daiakuji - cheap package
Big Bang Age - package
Daiteikoku box art

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