Daiteikoku is a conquest 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
Popularity Poll

About Edit

Daiteikoku (literal translation: "Big Empire") is a visual novel and simulation game set as a sci-fi parody reminiscent of World War II. Players follow an extensive cast of characters, many inspired by figures in world history (similar to the anime Hetalia), as they enact the major events which defined the World War II period alongside a slew of anime tropes, hijinks, and amorous encounters.

As a full-fledged eroge, Daiteikoku features several erotic scenes between the protagonist, Tougou Tsuyoshi, and the game's female cast. (No yaoi scenes are depicted in this game.) The player obtains access to erotic "H" scenes by completing specific events and gameplay objectives. For players who wish to enjoy the game without viewing erotic content, all but a few scenes can be avoided by not selecting "H" events as marked.

Translation Edit


The first notable, fan-driven English translation project, was established on June 23, 2011. Before its abandonment due to lack of active translators, the project had reached 35% completion published in a downloadable release on March 10, 2012. This release remains the most developed translation to date. A number of translators over the years have attempted to revive the project, but no further publications have been made. 

Another team of fan translators moved to continue translation on September 2, 2015, three months after English publisher MangaGamer announced a licensing partnership with the game's original publisher, AliceSoft. This licensing partnership gave MangaGamer official rights to translate and localize AliceSoft games, including Daiteikoku, to the English market. After discussing the new project with MangaGamer's in-house translator, Arunaru, fan project leader ArtresLayfon would announce the project's termination before it could begin. In the announcement, ArtresLayfon offered the impression that their efforts were "rendered obsolete" by the possibility of a future release.

As of October 18th, 2018, no further news regarding either official or fan translation of the game has been announced. 


On April 07th, 2018, a full Chinese translation, which builds upon two previous partial translation efforts, was released. 

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 Trailer

Daiteikoku Gameplay Trailer


Daiteikoku Character Trailer

Daiteikoku Character Trailer


Daiteikoku Story Trailer

Daiteikoku Story Trailer


Daiteikoku OP (English Subbed)

Daiteikoku OP (English Subbed)



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

Figurines of Retia Adolf were announced for Feb 2012 and July 2013.

Dai SeriesEdit

Dai Series

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