While the name gyokuro itself isn't specifically defined pertaining to a particular use, there are many cases in which the tea leaves used in tea beverages called 'gyokuro-iri' (containing gyokuro) are similar to those of kabuse-cha (covered tea), which are not cultivated under trellises like real gyokuro but under a synthetic textile sheet that is put directly on the tea plants for fewer days than in the case of genuine gyokuro.
玉露の呼び名自体に特に規定があるわけではなく、特に茶飲料の「玉露入り」に配合されている茶葉は、棚を作らず化学繊維で茶の木に直接カバーを掛け、かつ被覆日数の浅いかぶせ茶に近い物である場合も多い。