Ishikawa Diagram

Ishikawa diagrams, also known as fishbone or cause-and-effect diagrams, organize potential causes of a problem into categories branching off a central spine. They 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)
  • Under-indented cause (warning)

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.