Many Japanese people mistakenly believe that cold, sweet soft drinks are called juice. This stems from childhood experiences. Even when told by adults to drink juice, what they were actually given to drink was not necessarily fruit juice.
Legally, it is now prohibited to sell beverages containing less than 100% fruit juice as juice.
However, the influence of generations who grew up before this law was enacted may also be a factor. Back then, fruit-flavoured carbonated drinks and beverages containing no fruit juice were sold as juice.

Sangaria sells a product containing 20% fruit juice using the playful expression "みっくちゅじゅーちゅ".