A single-file desktop tool that edits the save file (KOUKAI2.DAT) and game data (MAIN.EXE)
of Uncharted Waters II, a 1994 MS-DOS game by KOEI. It is a Python/Tkinter reimplementation
of the 1997 HORIEDIT.C editor, extended to cover data areas the original did not handle
(companions, ships, loyalty, durability caps and more). Runs entirely offline: no network
access, no telemetry. It reads and writes only files inside the game folder the user selects,
and ships no game data of its own.
Publisher’s description
What is Koukai2 Editor?
Koukai2 Editor by genishs is open-source Windows software in the text editors category.
Installation and requirements
The publisher provides Portable installers for 64-bit Windows. It runs without installation (portable).
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Portable: runs without installation
- Updated in the last two months
Cons
- No native ARM64 build
In short: Koukai2 Editor is an open-source text editor tool for 64-bit PCs.
Is Koukai2 Editor safe to download?
- The file is served by github.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
C58FB66BA19F118518725DDA51A08F2889088A70D20DFCE054626D0DAFB14B9C· Open the VirusTotal report for this hash - The link has not been checked yet
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 1 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 0.4.19Latest | October 30, 2026 | — | 64-bit Portable |
Install from the command line
Silent install ›winget install --id genishs.Koukai2Editor -eProgram files (.exe): koukai2-editor.exe
Related guide: How to use winget: install and update apps
Information
- Publisher
- genishs
- Category
- Text editors
- Licence
- MIT
- Price
- Free
- Requires
- Windows 11 / 10
- Architecture
- 64-bit
- Installer
- Portable
- Version
- 0.4.19
- Released
- October 30, 2026
- Added to the catalogue
- November 3, 2026
- Versions listed
- 1
- Website
- github.com
- winget ID
- genishs.Koukai2Editor
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is Koukai2 Editor free?
Yes. Koukai2 Editor is open-source software under the MIT licence.
Is Koukai2 Editor safe to download?
The download comes from github.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Koukai2 Editor with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Does Koukai2 Editor run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 64-bit version through emulation.
Can I use Koukai2 Editor without administrator rights?
Yes, it is portable: unpack and run it.
What are alternatives to Koukai2 Editor?
Notepad++, Atom, Neovim, Geany and FontForge. The alternatives page compares them.
