Beat to Your Own Drum: The World of Taiko no Tatsujin Custom Songs

For decades, Bandai Namco’s Taiko no Tatsujin has remained one of the most recognizable rhythm game franchises in history. The simple joy of striking a traditional Japanese taiko drum—red Don (ドン) for the center, blue Ka (カ) for the rim—is universally intuitive. However, dedicated players often reach a point where the official tracks, DLC packs, and arcade selections leave them wanting more.

Enter the vibrant community of Taiko custom songs (often referred to as custom charts or custom maps). Through fan-made simulators and open-source charting, players can bring virtually any track into the game—from anime openings and Western pop hits to complex, high-BPM Vocaloid tracks.

How Taiko Custom Songs Work: The .tja Format

At the heart of the custom Taiko ecosystem is the .tja file format. Originally designed for early PC simulators like TaikoJiro (太鼓さん次郎), a .tja file is a plain-text document containing the metadata and step-by-step layout of a chart.

A standard custom song package typically consists of three main elements:

1. Audio File: Usually an .ogg or .wav track containing the music.
2. .tja Chart File: A plain-text script that defines song properties (title, artist, BPM, offset) followed by a line-by-line sequence of note commands.
3. Visual Assets (Optional): Custom background art, video previews, or album covers.

In a .tja file, numbers dictate what note appears on the scrolling timeline:

• 1 = Small Red (Don / Center)
• 2 = Small Blue (Ka / Rim)
• 3 = Large Red (Big Don)
• 4 = Large Blue (Big Ka)
• 5–8 = Drum rolls, balloon notes, and special gimmicks

Playing Custom Charts: Popular Simulators

Because official console releases (like Rhythm Festival or Drum ‘n’ Fun!) are closed ecosystems, the custom song community primarily thrives on PC through standalone simulators.

1. OpenTaiko

OpenTaiko is currently the leading open-source simulator in the community. Built as a modernized successor to TJAPlayer3, it features crisp UI themes, extensive skinning support, smooth performance, and support for multi-player modes and custom avatars.

2. TJAPlayer3 (and modern forks)

For years, TJAPlayer3 was the standard PC engine for replicating arcade-accurate UI. While development on the base engine has slowed down, various active community forks continue to maintain compatibility for custom .tja charts.

3. Web-Based Simulators

For quick sessions without installing software, web-based Taiko simulators allow users to drag and drop custom .tja files directly into their web browser to play instantly using a keyboard or connected USB controller.

The Art of Charting: Creating Your Own Maps

Creating a custom chart is equal parts musical rhythm mapping and level design. Popular charting utilities—such as TJAstudio or PeepoDrumKit—provide visual timeline editors that eliminate the need to type .tja text commands manually.

Key considerations for charting include:

• BPM and Timing (Offset): Aligning the grid perfectly with the song’s beat is crucial. Even a offset error of 10 milliseconds can throw off the hit registration.
• Hand Alternation & Flow: A well-designed chart accounts for physical drum play. Patterning notes so that players can alternate left and right hands comfortably makes a chart feel natural rather than awkward.
• Difficulty Scaling: Traditional chart sets include multiple difficulty levels (Easy, Normal, Hard, Extreme / Oni, and hidden Ura Oni) to cater to both casual players and expert drummers.

Community and Copyright Considerations

The custom Taiko scene relies on fan archives and Discord communities for chart sharing, tutorial support, and skin development. When diving into custom songs, keep the following best practices in mind:

• Respect Creators: Always credit the original song artists and chart makers when sharing gameplay or distribution packs.
• Non-Commercial Use: Custom charts and fan simulators are community projects created for fun; commercial distribution or monetization of copyrighted audio assets is strictly avoided.

Whether you want to chart your favorite local indie band or tackle insanely fast speedcore tracks, custom songs give Taiko no Tatsujin unlimited replayability—letting you drum to whatever music inspires you.

How to install OpenTaiko
This video provides a practical step-by-step tutorial on how to set up OpenTaiko, making it easier to start playing custom charts on your PC.