If you trace Iwagumi layouts to their origin, you will find a layout that Takashi Amano created approximately 30 years ago. It was a simple layout created by arranging river rocks and planting solely with Echinodorus tenellus. According to Takashi Amano, while some people did not seem to be surprised very much by the layouts that he had created through trials and errors up to that point, when they saw this Iwagumi layout, they seemed truly amazed by its unique and unusual beauty. Iwagumi layout style did not exist back then, and no one, including Mr. Mitsuo Yamazaki, the importer of E. tenellus, had any detailed information on the plant. It was truly an original creation by Amano that no one had seen before.