Acacia koa for up to 25 years. Scarification is needed before "A. koa" seeds will germinate. Koa is endemic to the islands of Hawaii, Molokai, Maui, Lānai, Oahu, and Kauai, where it grows at elevations of . It requires of annual rainfall. Acidic to neutral soils (pH of 4-7.4) that are either an Inceptisol derived from volcanic ash or a well-drained histosol are preferred. Its ability to fix nitrogen allows it to grow in very young volcanic soils. Koa and ōhia lehua ("Metrosideros polymorpha") dominate the canopy of mixed mesic forests. It is also common in wet forests. The koa's trunk was
Koa Kannon members it dissolved in March 2011. At JR Atami Station take the Izu Tokai Bus bound for Yugawara Station, get off at the “Koa Kannon” stop, and walk to the temple. At JR Yugawara Station there is also a bus going in the direction of Atami and Mount Izu. Koa Kannon The refers to a statue of Kannon, the bodhisattva of compassion, located atop Mount Izu in Atami, Shizuoka Prefecture, as well as to the temple, formally a religious corporation called the Reihaizan Koa Kannon, which is dedicated to it. Koa Kannon is from the same lineage as the Hokke