// Disciplines
Philosophy of Nature
6 topics
- Hot Springs
What Changes Between Hot Springs on Cold Days and Hot Days
What changes between hot springs on cold days and hot days? This question explores how external conditions like air temperature affect the i…
- Hot Springs
Whether to Share Your Favorite Hot Spring with Others or Keep It Secret
Whether to share your favorite hot spring with others or keep it secret. This question reflects our internal conflict between the 'joy of sh…
- Mineral and Stone Hobby
The Sensation of the Concept of Mineral Hardness
Mineral hardness is a concept that can be perceived through multiple senses, such as resistance to scratching, the sound when tapped, and th…
- Mineral and Stone Hobby
The Boundary Line Between Gemstones and Minerals
Where is the line drawn between gemstones and minerals? Various criteria intersect, such as beauty, rarity, hardness, cultural value, and wh…
- Mineral and Stone Hobby
Which Do You Notice First: Color, Shape, or Transparency?
The moment you pick up a stone, what catches your eye first? Its vibrant color, its unique shape, or the depth brought by its transparency? …
- Hot Springs
The Non-Ordinary Sensation Created by the Steam of Hot Springs
The non-ordinary sensation created by the steam of hot springs refers to the phenomenon where the white mist rising from the onsen softly co…