4D2U Project


September 25, 2015 English page was updated.
June 24, 2015 Version 1.2.4a was released.
March 17, 2015 The 4D2U Dome Theater at NAOJ, Mitaka Campus has been renewed.
As of April 2015, we will resume live shows with the renewed dome theater system. Enjoy Mitaka and movie contents with highly improved images.
Please see here (Japanese page) for details.
December 16, 2014 There have been over 800,000 downloads of Mitaka.

Past news

What is Mitaka?

Mitaka is software for visualizing the known Universe with up-to-date observational data and theoretical models, developed by the Four-Dimensional Digital Universe (4D2U) project of the National Astronomical Observatory of Japan (NAOJ). Mitaka users can seamlessly navigate through space, from the Earth to the edges of the known Universe.

Mitaka was originally developed for 3D visualizations on multiple screens at the 4D2U theater in NAOJ's Mitaka headquarters. However, it can also be used on a single Windows PC.

4D2U has been supported by the National Astronomical Observatory of Japan (NAOJ) and other collaborating organizations including, Research and Development for Applying Advanced Computational Science and Technology (ACT-JST) ["Establishment and Application of Four-Dimensional Digital Space Data (led by Norio Kaifu, 2001 to 2004)"], as well as the Ministry of Education, Culture, Sports, Science and Technology [Effective Promotion Program for Industry-Academia-Government Collaborative Research supported by Special Coordination Funds for Promoting Science and Technology – "Establishment of Distribution System for Four-Dimensional Digital Video of the Universe (led by Shoken Miyama, 2004 to 2007)"].
Now, Mitaka is being developed by the developer.

System Requirements

Recommended Minimum Hardware Configuration
OSWindows 10/8.1/8/7/Vista/XP (*)
CPUPentium4 1.8 GHz or better
RAM512 MB or more
Graphics CardGeForce 3 or better
Display Resolution1024x768 pixels or more
Hard Disk Space150 MB or more

*) To use the software with Windows XP, select mitaka_VC.exe as the executed file.

It is possible to run the program on slower computers by carefully modifying default settings to reduce the texture resolution, for example.

Hardware Configuration at the 4D2U Dome Theater at NAOJ
OSWindows 7 Professional
CPUIntel Xeon E5-1650v2 3.5 GHz
Graphics CardNVIDIA Quadro K5000
Display Resolution1920x1200 pixels

We have not tested other configurations. Please understand that we are not qualified to offer hardware recommendations. Some systems that meet the guidelines above may still have problems running the software.


We provide Mitaka for no charge and without any warranty.
You may use it for your personal enjoyment at your own risk.

This version does not include the topographic data and illustrations for the constellations. The topographic data can be downloaded separately from the links below. The illustrations for the constellations will be released later.


Download the software using the following links.
Please read the "Terms and Conditions of Use" here before using the software.

The Latest Version

* Mitaka Version 1.2.4a (June 24, 2015 Released)
(ZIP File; 89,139,759 Bytes (approx. 85.0 MB) ) (History)

Older versions can be downloaded from here.

Topographic Data

The topographic data for the Earth, the Moon, and Mars can be downloaded from the following links.

Caution: The file sizes are large.

* Topographic Data for the Earth
(ZIP File; 33,385,825 Bytes (approx. 32 MB) )

* Topographic Data for the Moon
(ZIP File; 161,797,846 Bytes (approx. 154 MB) )

* Topographic Data for the Moon (high-resolution version)
(ZIP File; 594,305,291 Bytes (approx. 566 MB) )

* Topographic Data for Mars
(ZIP File; 130,911,334 Bytes (approx. 124 MB) )

How to Use the topographic data:
First, unzip the downloaded file. Then, copy the file "earth_topo.dat", "moon_topo.dat", or "mars_topo.dat", which are generated by unzipping the downloaded file, into the "data" folder in the Mitaka folder. You will be able to view the topography of the Earth, the Moon, or Mars the next time you launch Mitaka.

Software Development

Tsunehiko Kato (member of the NAOJ 4D2U Group) designed and developed the Mitaka software, including its algorithms for image rendering, data processing, and its Japanese manual. Sorahiko Nukatani (cooperative engineer from RIKEN) worked on the aesthetic design, including title design and color tables.


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