From the longer Wikipedia page 
A type of sencha tea
Shincha(新茶}, literally "new tea", represents the first month's harvest of Sencha, a Japanese green tea. Basically, it is the same as ichibancha (番茶), "the first-picked tea," and is characterized by its fresh aroma and sweetness. Use of the term "ichibancha" rather than "shincha" generally infers its difference from "nibancha" ("the second-picked tea") and "sanbancha" ("the third-picked tea"). Use of the term "shincha" generally is to emphasize that it is that year's earliest tea, and is timely and seasonal.
The opposite term is kocha (古茶), or "old tea," referring to tea left over from the previous year.