TaikoForge
Forging music into Taiko charts
AI Taiko Chart Generator:
Upload a Song, Get a TJA Chart
Upload a song and TaikoForge analyzes the rhythm, detects the BPM and start offset, and produces a playable Taiko no Tatsujin–style chart file (.tja).
Listen · Demo
Hear what it produces
The song from our launch video. Switch engines and difficulties to compare the charts.
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These charts are the site's raw output, cut to 48 seconds and not edited by hand. Hit sounds are synthesized live in your browser.
Maximalism by Punch Deck ·
CC BY 3.0
Gameplay videos
Recordings of people actually playing charts made here.
Videos load from YouTube only after you press play. Until then, this page makes no outside requests.
Engines
Four charting engines — we pick the right one for you
Onset
Millisecond-Precise Charting
Hears every drum hit directly from the audio, with no grid constraint. Most accurate on tempo-changing songs and 24th-note passages.
Neural
Phrase Model
Generates cell by cell, with phrase structure closest to hand-written charts.
Hybrid
Best of Both
Uses a Neural draft to pick similar patterns from human-made charts — accurate and playable.
Auto
Smart Routing
Picks an engine based on the song’s rhythmic complexity and note density.
Details
It also handles all of this for you
BPM & Start Offset
BPM snaps to a whole number when it's close, so 150 isn't misread as 149.987.
Tempo-change detection
Tick the option and BPM changes within the song are found automatically and written as BPMCHANGE (experimental, off by default).
GOGO TIME
Automatically finds the climax sections of the song.
Rolls & Balloons
Lengths are checked against the audio’s actual volume curve.
Multi-difficulty in one click
Paid plans generate all four difficulties — Easy/Normal/Hard/Oni — for one song at once.
Adjustable parameters
Fine-tune density, roll amount, and big-note ratio yourself.
Tools & Guides
Features
Chart editor
Drag notes against the waveform, extend rolls, mark GOGO sections, and loop A-B to playtest repeatedly.
→Video Generator
Render the chart as a 60fps mp4: 16:9 or 9:16 portrait, with multiple difficulties overlaid and a custom background.
→Lyrics Alignment Tool
AI aligns lyrics to timecodes and writes them as #LYRIC; importing and exporting SRT subtitles is also supported.
→Beginner guides
TJA Format Guide: Headers, Notes & Commands
What every line of a TJA file does: header fields, note numbers, and commands like #BPMCHANGE and GOGO.
GUIDE 02How to Make a Taiko no Tatsujin–Style TJA Chart
The full workflow: prepare the audio, check BPM and OFFSET, pick a difficulty, then download and play it in a simulator.
GUIDE 03How to Add Custom Charts to OpenTaiko: TJA Folder Setup
How to organize folders, how .tja and audio files correspond, what box.def is for, and a checklist for when songs do not appear.
GUIDE 04How to Adjust TJA Offset and BPM: Fix an Out-of-Sync Chart
OFFSET sign, which direction to adjust, symptoms of an inaccurate BPM, and #BPMCHANGE tempo changes.
ZhongTaiko
About Us
TaikoForge is built by 盅鼓 ZhongTaiko — we’re real taiko people. Want real taiko gear and merch? Check out our main site.