caffine content.
+ its from Japan, Keirin racers approve of it
aside from that. its just mint flavor and black. haha.

haha oh yea, the wording on the package is pretty funny.
Typical crappy Japanese translations.
It says something like "high-tech gum" .... something weird like that.

but by FAR, the best Japanese candy is this:
Hi-Chews!
Chewyest shiz you ever had in your mouth.
It should become the official candy of BF.