Ashitaba Japan

How will I know if a plant is the ashitaba plant?

They said it originated in
Japan, others call is the tomorow leaf plant. I have a plant ashitaba at home butim not sure if it is a real ashitaba plant.

http://www.organicashitaba.com/

Bioluminescent Mushrooms & other marvels of Hachijojima Island 八丈島

JAPANESE ASHITABA GREEN TEA from HACHIJO ISLAND, JAPAN $44.00

10x Fukuundo Ashitaba Japanese Green Tea~Hachijo Japan $149.99

6x Fukuundo Ashitaba Japanese Green Tea~Hachijo Japan $99.93

4x Fukuundo Ashitaba Japanese Green Tea~Hachijo Japan $73.98

2x Fukuundo Ashitaba Japanese Green Tea~Hachijo Japan $41.98

3x Fukuundo Ashitaba Japanese Green Tea~Hachijo Japan $57.98

Fukuundo Ashitaba Japanese Green Tea ~ Hachijo, Japan ~ $24.99