Is the No. 1 Pharmacy enzyme sold in Japanese duty-free stores fake?

The so-called Daiichi Pharmaceutical was registered in Japan by foreigners, specifically for tour groups. Not many Japanese locals know about it, let alone buy it.

Quality aside, even if the price is much more expensive than local Japanese brands,

Daiichi Pharmaceutical's enzymes are N times more expensive than local Japanese brands. (For example, the monthly dosage of Kobayashi Pharmaceutical, DHC and other enzymes does not exceed 2,000 yen)

The effect of health products is only that, mainly for psychological effects, so there is no need to buy so expensive ones.