Ishikawa (Fishbone) Diagram

Mermaid Studio provides language support for Ishikawa diagrams (also known as fishbone or cause-and-effect diagrams) inside IntelliJ IDEA and other JetBrains IDEs. Ishikawa diagrams organize potential causes of a problem into categories branching off a central spine, and are widely used in quality management and root cause analysis.

Syntax Highlighting

Syntax highlighting integrates directly with IntelliJ’s color scheme system, so diagram colors always match your editor theme.

Armada Dark

Islands Dark

Islands Light

IDE Support

Mermaid Studio provides comprehensive support for Ishikawa diagrams:

• Syntax highlighting with indentation-based depth highlighting that visually distinguishes cause levels
• Dedicated color settings page for customizing Ishikawa-specific highlighting
• Code folding to collapse cause branches
• Formatting to maintain consistent indentation
• Structure view for hierarchical overview of causes
• Navigation bar for quick access to diagram elements
• Inspections to catch structural issues:
  • Blank line before event (error)

Quick Syntax Reference

ishikawa-beta
Website Downtime
Infrastructure
  Server overload
  Network failure
Software
  Memory leak
  Unhandled exception
Process
  No monitoring
  Slow incident response
People
  Insufficient training
  Key person dependency

Key elements:

• Start with ishikawa-beta (or ishikawa). Requires Mermaid.js 11.13.0+
• The first line after the keyword is the event - the problem being analyzed (the “head” of the fish)
• Subsequent lines are causes (the “bones” of the fishbone)
• Indentation determines hierarchy - deeper indentation creates sub-causes
• Use <br> or <br/> for multi-line labels

For complete syntax details, see the Mermaid Ishikawa documentation.