Answer:
It has a few small mistakes.
Honestly, it is pretty good, since I know what you are trying to say. It just needs to be phrased a bit differently. Here is a grammatically correct version:
La primera clase es química. No me gusta la educación física. La clase de japonés comienza a las diez de la mañana y termina a las once. Tengo un lápiz y un cuaderno en mi mochila.
In case it wasn't what you were trying to say, it translates to:
The first class is chemistry. I do not like physical education. The Japanese class begins at ten in the morning and ends at eleven. I have a pencil and a notebook in my backpack.