Umineko Catbox English

This project is dedicated, in its entirety, to my beloved Tara.

Reading Umineko together, with this patch, while it was still being worked on, was one of my best – and, tragically, last – memories with her. It is a memory I will treasure forever.

My original decision was to preserve everything about that experience, as perfectly as possible. That included the imperfections of the patch, the various minor text issues here and there.

This decision still stands, in part. However, I also now realise that she wouldn’t want our hard work to be abandoned in an unfinished state, that she would want others to experience a truly “perfect” version of this incredible story.

So I shall do both. The master branch is left as-is, untouched, at the day of her passing, save for this notice at the top. The release that most closely corresponds to this state is v9.9.99999.

All of the new development on this project shall happen on the rebirth branch.

Rest in peace, Tara.

And may you live on in everyone’s hearts, for all eternity. May your name be forever engraved on the cold steel of the Web. May its sound endlessly permeate its cables and frequencies.

I love you, my heart.

Note: the canonical link for this project is If you wish to link to this project, please use this link. However, you are free – in fact, encouraged – to re-host/mirror the downloads for the project on alternate sources, as long as you backlink to the canonical URL.

Note 2: the project is finished. It provides a fully English-translated experience with the game. I remain available for fixing bugs, typos, and installation support, but no new features will be added to the project. This also means I will not update the patch for working with any re-release of Umineko that may happen in the future.

English patch for Umineko Catbox

This is an English patch for Umineko When They Cry: The Symphony of Catbox and Dreams, the console version of Umineko on the Switch.

This patch is meant to be used on the actual console release of the game. It is not a standalone application.


Besides me, the following people have directly contributed to this project:

Furthermore, this patch would be impossible without the resources and tools provided by the the following projects:

Applying the patch

The game, and this patch, can be played in a few ways:

Additionally, promising future developments exist for the game. These do not currently work, but likely will in the future:

Please follow the below instructions to get the patch set up.

No matter the platform you play on, you will need a copy of the base game and the decryption keys for it. Game updates are optional, the patch applies cleanly regardless of the game’s version.

To comply with US laws, you have to buy the game and dump it using nxdumptool from a hackable Switch to obtain a legal copy for emulation. Software distribution laws in other countries may vary.

On PC (using yuzu)

The Switch emulator yuzu is compatible with the game and the patch.

To set yuzu up, you will need a copy of the prod.keys file dumped from a hackable Switch and the game itself. Once you have acquired the keys, navigate to File -> Open yuzu folder, then find the subfolder called “keys” inside that and paste the file there. Restart yuzu and double-click the giant empty rectangle in the main yuzu window to add your game folder.

To install the patch, download the yuzu version,
then right-click the game in yuzu, choose “Open Mod Data Location” and extract the entire archive there.

You may now start the game in yuzu and play it in English.

On PC/Mac (using Ryujinx)

The Switch emulator Ryujinx is compatible with the game and the patch.

To set Ryujinx up, you will need a copy of the prod.keys file dumped from a hackable Switch, the Switch firmware, and the game itself. Having acquired these, you may follow their guide to finish your configuration and add the game to the emulator, but please ignore the “Managing mods” section as this patch has a somewhat more complicated structure and cannot be simply added to a per-game folder like they recommend.

To install the patch, download the Atmosphère version (Ryujinx is 100% Atmosphère-compatible),
then choose File -> Open Ryujinx Folder. Navigate to the “mods” directory and extract the entire archive to that location. If the “mods” directory does not exist, create it first.

You may now start the game in Ryujinx and play it in English.

On Android (using yuzu)

Some Android devices may be able to run the game using yuzu’s Android port, though the current system requirements are rather high by Android standards: the device has to have a Snapdragon CPU and at least 8GB of RAM.

Just like on PC, you will need a copy of the prod.keys file. yuzu will ask you for its location on its first run. It will also ask you to specify the folder in which the game is located. For performance reasons, I recommend not putting the game on an SD card unless you absolutely have to, keep it in your internal storage.

Once the initial setup is done, run the base game (in Japanese) at least once and exit it. This will allow you to confirm that your device can actually run the game, and also create some required files necessary for the patch installation to work.

You may now download the yuzu version of the patch,
and extract it somewhere on your device.

Now return to yuzu, and in the settings menu tap “Open yuzu folder”. Pull out the menu on the left, switch to “Internal Storage” (or “SD Card”) and find the extracted mod files. Tap and hold the UminekoCatboxEnglish folder to select it, and choose “Copy to…” from the kebab menu on top. Pull out the left panel again, tap “yuzu” and navigate to load/01006A300BA2C000/, then click the “Copy” button to install the patch.

The next time you start the game, it will be in English.

On the Switch (the actual hardware)

If you want to play the game on your Switch hardware, it will need Atmosphère installed on it. If you don’t have Atmosphère already, please see if it’s compatible with your Switch model and install it if it is. Afterwards, download the Atmosphère version of the patch and copy it to the “atmosphere” folder on your SD card. The next time the game starts, it should be in English.

Alternative translations

There is a fair number of translations of Umineko to other languages that are based on this patch.

Note that these are completely unrelated to me. I cannot guarantee their accuracy or even basic functionality. I will not help you get these working, nor will I answer any questions about them.

If you wish to create your own fan translation, please check the documentation here. I will most likely not be able to provide any assistance beyond what’s written in these docs.


If you find a bug in the patch, please use the issue tracker. If you have a question, please use the forums. Note that any modifications to the game that aren’t translation-related are explicitly out of scope of this project, please refrain from making such requests. This includes fixing the couple of bugs that are present in the original Japanese release.