YataLogic’s analysis
The key point of this case
Map numerical levels to body colors and expressions as cues for choosing an action.
From official information
Officially documented uses
- Harerun is used in the agency’s general communications, while Volken is used for volcanic disaster preparedness.
- Volken’s body color and volcanic plume change with the state of volcanic activity.
- The official special website and Meteorological Science Museum offer learning through exchanges between characters, quizzes and games.
YataLogic’s view of the challenge
Which challenge does this relate to?
Numbers in volcanic alert levels and explanations of activity may not readily connect the severity of danger with the actions a person should take.
Roles identified by YataLogic
The character’s job
- Map volcanic activity to Volken’s body color and plume
- Present beginners’ questions in sequence through exchanges with Harerun
- Use quizzes and games to prompt choices of actions appropriate to each level
Application ideas from YataLogic
How could another business apply this?
Map conditions such as equipment faults or inventory levels to a character’s color, expression and shape.
Where is it used?
Japan Meteorological Agency special website and Meteorological Science Museum
What could you measure?
These are example measures for your own application, not reported performance figures from the featured company.
- Explain how displays differ with the state of volcanic activity
- Choose an action appropriate to the volcanic alert level
Sources
- View the official page (opens in a new tab)www.jma.go.jp
Source checked: 2026-09-02
Status documented in the source: Current example