Where to get Concerta prescription filled in Tokyo

Bit of a Hail Mary but with the adhd medication shortage going on right now I’m at a loss. Went to four different local pharmacies and all of them were out of stock of Concerta. I leave for a trip on Saturday and won’t be back in Tokyo for a bit less than a week so I need to get it filled asap, before they invalidate my prescription. Does anyone know what pharmacies will have it in stock/are more likely to? I figure I can try shibuya/shinjuku but I’m not sure if they’d be more or less likely to have it.

by bubblegumkin