Bamboo shoot (take no ko - 竹の子 or 筍)

Bamboo shoots are a spring delicacy in Japan. They come from a very large bamboo and are cut when they come out of the ground and reach about 20cm. They are boiled and sliced in thin strips.

http://en.wikipedia.org/wiki/Bamboo_shoot#Local_names

http://www.justhungry.com/how-cook-bamboo-shoots-takenoko