Tomokin sensei, thank you so much for the link to your 'Line Account.' The link was not visible to me here in Toronto, Canada but NOW I can, yeah! My goal for the year 2025 is to improve overall swimming disciplines, as well as learning to swim 'butterfly' --- yes, for the first time in my advanced years. I am sorry, for now, I do not have the access to Japanese keyboard. But I'd like you to know that I am so appreciative of your passion to teach us swim better via the web!