Two different Japanese condiments are called beni shoga. One is pink, flat, and sweet-and-sour beni shoga, which you see at sushi restaurants. Another one is red, julienned, and sour, but not sweet. Both of them are pickled ginger.
The pink sweet beni shoga is sometimes called gari at sushi restaurants, but English wiki calls it as sushi ginger as it is almost exclusively used for sushi. It is made of young ginger root harvested in summer.
Serve Suggest: The red beni shoga is used for wider purposes. Julienned red condiments can be seen on top of beef bowls, okonomiyaki, takoyaki, yakisoba, oyakodon, etc.