Artist's commentary
At first I wondered if it was owing the influence of the grand festival at Dazaifu Tenman-gū, but however I considered it, this was the cause. The tour cost was cheaper, about ¥10,000 in all, which was super-mysterious. :-)
Today starts the Dai⑨shu Touhou Fest chapter. I have a hunch it'll be an eat-'til-you-drop tale, after all!