I remember liking it too; it was actually a Schweppes product but as my boss said, it was straight to flush out. The Japan market just doesn't like sweet drinks. The top drink was green tea, which probably caused consternation as it was so expensive to manufacture.

In retrospect I miss the teas from Japan more than any of the weird flavours we had. Thankfully one can make them oneself but there is something special about going to a corner store and having relatively healthy options instead of a hundred flavours of sugar water.