Hualien Giant (Pteris wallichiana) at the Mikagawa River(Mikagawa no nachishida)


Pentagonal shape when seen from above

This plant was named “Nachi shida” in Japanese because it was found near Nachi Waterfall (Nachikatsuura Town) in the Meiji Period. Usually, the whole shape of any plant of the division Pteridophyta, including ferns and fern allies, is triangular when seen from above, but Hualien Giant features a pentagonal shape. This plant has become widespread so as not to suffer from deer-eating damage, and was designated a National Treasure in Kawazu Town in Shizuoka Prefecture, which is considered to be the northern limit of its habitat.


Ago, Shirahama-cho
Season / Time zone
Spring Summer Autumn Winter / Daytime
Weather conditions
Sunny Cloudy
Frequency of appearance


Fifteen min. on foot from Mikagawa[三ケ川] bus stop of Shirahama Community Bus(reservation required; bus services suspended on Sundays and holidays). For a bus reservation, please contact Shirahama Daiichi Koutsu (0739-42-2916).


Recommended spot

JR Kii-Tonda Station > Ago Ferry Crossing ("Ago-no-Watashi") Remains