All of the opening ceremonies in Japan are like this.
We wear a uniform and assemble at their gym, and listen to a principal's talking.
It's usual in Japan.
One day, a ELT teacher came to our school from the US.
He attended the opening ceremony and did a introduction of himself.
If I remember correctly, he said that he was surprized because all of us had a black and short hair.
It is a rule that students must not dye their hairs other colors.
Japanese society tends to regard students who are dying their hairs bad.
And all of Japanese have a black hair in nature.
The ELT's country, say, the US, however, probably don't exist such a rule.
Actually his hair is golden, although it is in his nature.
I didn't think it is strange when I heard his comment about our hairs.
I thought it is usual having a black hair.
But now, I wonder why we cannot permit dying our hairs.
I don't think our hairs cause a big problem to our schools.
Is it a culture problem?
Or riligious one?
I don't know though I am Japanese.