This is a Shima-Hebi (striped snake), a meter-long non-venomous reptile that took refuge in the shoe box of one of the Grade 2 kids during the festival rehearsal (probably just to get away from the noise.) One of the teachers picked it up with a pair of long tongs and tossed it behind the school. I was rather pleased for, apart from some roadkill, this is the first serpent that I've seen in Japan.
Here is the flag-raising ceremony accompanied by the Japanese National Anthem.
I took several other videos of the ceremonial proceedings but they're a bit too revealing of the children.
Instead, here are some prints of the kids' birthday logos that they'd designed.