In terms of newer places selling it - I swore i saw it for sale at Stonemill Matcha but I can’t find it on their site:
https://stonemillmatcha.square.site/
Breadbelly:
https://www.instagram.com/p/CAqxC4Mhxhx/
And, Bread n’ Chu:
However, I haven’t tried shokupan at any of these places so I cannot vouch for them.
