The Kumamoto branch of Din Tai Fung (the chain mentioned in the article) can be found in Tsuruya Department Store:

Kumamoto Branch
6-1 Tetori-cho
Kumamoto City 860 8586
(7F Tsuruya Dept. Store)
TEL:81-96-211-0667

http://www.japantimes.co.jp/life/2013/12/31/food/juicy-chinese-dumplings-will-shanghai-your-taste-buds/