The picture was posted on December 25th, and the commentary includes a line from Udonge to the effect of "But all we have around here is bamboo...", so that would seem to be the case, yes.
It's not Tanabata!!Hey, it's not Tanabata!!Santa...It's not Tanabata.
Tanabata is the Japanese Star Festival, in which it is customary to hang one's wishes written on a small piece of paper from a bamboo tree.Is decorating usually so problematic I wonder?After that, on this paper....you write that what you want, and hang it up...