Ecstasy Use Up in Japan?

I've always felt that when the amount of a drug confiscated in drug increases dramatically, it's a sign that use of the drug is increasing just as dramatically. As demand rises, drug manufacturers ship more to the country, and cops make more busts.

Based on this theory, Ecstasy use in Japan must be surging. This from the Kyodo News Service:

Customs houses across Japan confiscated 1,358 kilograms of illegal drugs and stimulants in 2004, up 23 percent from the previous year and topping the 1 ton level for the second straight year, the Finance Ministry said Friday.

Confiscation of tablet drugs, such as MDMA, better known as ecstasy, reached an all-time high of 429,000 tablets, up 11 percent from the previous record high marked in 2003, the ministry said.