For those who cant get this dish in your neck of the wood may consider buying it online.
Animate is selling the Tenshi instant spicy mapo doufu sauce at their web. Not sure if there are lots of mapo doufu fans or Tenshi’s fans but the item is currently sold out. I saw it on sale at Gamers in Akihabara as well few weeks back.
It even comes with the lunch ticket. Nice touch. Just make sure it don’t get blown off by the wind. ^^;