Dear Student,

First off, it's always a pleasure sharing lessons with you, and thank you for your support! I'm sending this message to notify you about recent changes to my schedule.

I'm currently finishing my postgraduate studies, and classes are in the morning on Sundays. I will need an extra hour free in the morning to attend class. Therefore, my schedule will open up at 11:00 a.m JST. 

I apologize for any inconvenience, and if you have any questions please message me! Have a great day, and I hope to see you soon.

All the best,
Brian