tja2fumen is a tool that allows you to convert TJA charts (.tja) to fumen charts (.bin).

---

Important

tja2fumen is a tool designed for mod developers. It allows modders to load TJA charts into official games by converting them into Taiko's official binary fumen file format (.bin).

If you are not a mod developer, and you just want to play TJAs on Taiko no Tatsujin PC, please install and run TakoTako. (Alternatively, you can also run TakoTako's TJAConvert.exe directly on your TJA files.)

Note

Replacing tja2bin (TakoTako 3.2.0 and below)

TakoTako 3.2.0 includes an older, flawed tool called tja2bin.exe. If you have downloaded TakoTako 3.2.0, you should replace the old tja2bin.exe with the latest version of tja2fumen.exe. This will ensure that your TJAs get converted accurately.

You can do this by:

• Downloading tja2fumen.exe from the releases page.
• Renaming the file to tja2bin.exe.
• Copying and pasting it into the {TDMX_INSTALLATION_DIR}/BepInEx/plugins/com.fluto.takotako/ directory, replacing the old tja2bin.exe.

Features

tja2fumen is designed to be an open source alternative to the closed source tja2bin tool that has been floating around various Discord servers. tja2fumen fixes several outstanding tja2bin issues, while providing an open source codebase to modify and learn from.

• Command line tool to convert .tja chart files to official fumen .bin files.
• Decodes official fumen .bin files (to inspect metadata and note data).
• Fix .bin files that were previously converted by tja2bin (WIP, see #65).
• Uses strong development practices (thorough test suite with example charts, type checking).
• Provides an open source resource for the Taiko no Tatsujin fumen file format.

Usage

TJA conversion

To convert a .tja file to .bin files, simply download tja2fumen.exe and run:

tja2fumen.exe "file.tja"

TJA + Audio conversion

tja2fumen.exe only converts TJA files. If you want to convert both TJAs and audio (.OGG or .WAV files) to .bin files, you can use the TakoTako plugin for the PC version of Taiko no Tatsujin. However, if you don't want to install and run Taiko no Tatsujin on PC, then you can use this simpler method instead:

1. Download the latest release of TakoTako.
2. Extract the TJAConvert.exe program into a separate folder.
3. Download the newest version of tja2fumen.exe. Rename it tja2bin.exe, then place it in the same folder as TJAConvert.exe.
4. Run the following command:

TJAConvert.exe "path_to_folder_containing_both_tja_and_audio/"

TJAConvert.exe will convert the audio to CRIWARE HCA packed into ACB container, and then it will call tja2fumen.exe to convert the chart files. (This is the exact same conversion you would get by running TakoTako as a BepInEx plugin -- you just have more control.) Note that the output audio is unencrypted, and that ACB audio files are incompatible with any NUS3BANK-based games.

Decoding fumen charts in Python scripts

If you want to explore the song structure of existing .bin files or .tja files using Python scripts, run:

pip install tja2fumen

Then, you can use tja2fumen's Python API as follows:

from tja2fumen.parsers import parse_fumen, parse_tja

fumen = parse_fumen("path/to/fumen_file.bin")
tja = parse_tja("path/to/tja_file.tja")

Please refer to src/__init__.py for further example usage of the Python API.

TJA Support

If there is an unsupported feature that you would like support for, please make a request by opening a new issue.

Supported file formats

Legend: ✅ = Fully supported, ❌ = Not supported

	tja 2 fumen	tja 2 bin	Comment
UTF-8 (with BOM)	✅	❌
UTF-8 (without BOM)	✅️	✅
Shift-JIS	✅	✅

Supported metadata

Legend: ✅ = Fully supported, ⚪️ = Ignored, ⚠️ = Incorrect behavior, ❌ = Not supported

	tja 2 fumen	tja 2 bin	Comment
BPM:, OFFSET:	✅	✅
TITLE:, SUBTITLE:, WAVE:, DEMOSTART:, etc.	⚪️	⚪️	The only global metadata needed are BPM: and OFFSET:.
COURSE:, LEVEL:, BALLOON:, SCOREINIT:, SCOREDIFF:	✅	✅
STYLE: (Single, Double)	✅	❌
EXAM1:, GAUGEINCR:, TOTAL:, etc.	⚪️	⚪️	Other simulator-specific metadata fields are currently ignored.

Supported notes/commands

Legend: ✅ = Fully supported, ⚪️ = Ignored, ⚠️ = Incorrect behavior, ❌ = Not supported

	tja 2 fumen	tja 2 bin	Comment
0, 1, 2, 3, 4	✅	⚠️	tja2fumen will write proper SENOTES (ド, コ, ドン, カ, カッ), see #41.
5008,, 6008,, 7008,	✅	✅
9008,	✅	⚠️
9000, 9008,	⚪️	⚠️	Double Kusudama note treated as 1 drumroll by tja2fumen, but 2 overlapping drumrolls by tja2bin.
A, B	✅	❌	Multiplayer "hands" notes are valid in fumens, but unrecognized by tja2bin.
C, D, E, F, G, H, I	⚠️	❌	Replaced by normal notes/rolls in tja2fumen.
#START, #END	✅	✅
#START P1, #START P2	✅	❌
#BPMCHANGE	✅	⚠️	See #16
#MEASURE	✅	✅
#SCROLL	✅	✅
#GOGOSTART, #GOGOEND	✅	✅
#BARLINEOFF, #BARLINEON	✅	✅
#DELAY	✅	❌	See #27
#BRANCHSTART, #BRANCHEND	✅	✅
#N, #E, #M	✅	✅
#SECTION	⚠️	❌	See #53, #27
#LEVELHOLD	✅	❌
#BMSCROLL, #LYRIC, #DIRECTION, etc.	⚪️	❌	Other simulator-specific chart commands are currently ignored.

Reporting bugs

If you've found a .tja file that tja2fumen converts incorrectly, please open a new issue on the tja2fumen repo.

It is especially important that you attach the song files to the issue. You can do this by adding the song files to a .zip (Select files -> Right click -> "Send to" -> "Compressed (zipped) folder"), and then uploading the .zip to the issue. This greatly helps me to reproduce and fix any issues.

Building on top of tja2fumen

If you are a developer looking to add tja2fumen to your project, you have two options:

1. For non-Python projects, you can download tja2fumen.exe and call it via a system call.
2. For Python projects, you can install tja2fumen via pip install tja2fumen.

tja2fumen uses a very permissable license (MIT License). You are free to distribute and modify tja2fumen, but please include a copy of the MIT License alongside the tja2fumen.exe executable if you copy it into your project.

Attribution

• The fumen-parsing code in this project is based off of a modified copy of the readFumen() function from the fumen2osu.py found in @KatieFrogs' fumen-tools project.
• The TJA-parsing code in this project is a Python translation of the parseTJA.js file from @WHMHammer's tja-tools.
• sakurada0291, DDDDDD, U-ros, and others in the Discord for helping to test tja2fumen. :)