Customs seized 972 packs (100 kg, over 500,000 baht) of undeclared Japanese matcha from a passenger at Chiang Mai airport on Monday; the quantity was judged commercial, not personal. No auction has been announced yet. For importers, the lesson is that matcha imports are tightly controlled: within the annual quota the duty is 30% (lower under an FTA), outside it 90%, and ASEAN-origin goods are generally duty-free. Declare all commercial imports and check quota and duty before bringing in stock.