01 / Limonite
Wherever it is found, it is called Takashi-kozo.It was first studied in Toyohashi.

Takashi-kozo is limonite formed when iron dissolved in groundwater gathered and hardened around plant roots and stems underground. Typically 2 to 5 cm across and 1 to 10 cm long, Hamaike Park and part of the Takashidai Junior High School grounds in Nishiyuki-cho are designated as a Prefectural Natural Monument.
- Typically 2-5 cm across, 1-10 cm long
- Designated sites: Hamaike Park and part of the school grounds
- Prefectural Natural Monument


