Cha soba are soba made of buckwheat soba ko and wheat komugi ko with the added ingredient of fresh green tea leaves ryokucha or ocha in japan cha soba is considered a delicacy and is only consumed on very special occasions green tea is considered by many to have many significant health benefits including high levels of antioxidants polyphenols theanine as well as a wide variety of vitamins and minerals cha soba is packed in a light proof foil packaging to protect the nutritional valu