This would be easier to do in the Notebook function of this website.

Thank you for your kindness!!

I understand what you are trying to say in the next two sentences, but the grammar is very incorrect. (I do not mean any disprespect! I could not even begin to write about ice cream in your language, much less get the grammar correct! :) ) You could say “With the appearance of Yukimi daifuku, ice cream sales rose higher and higher each winter. Rose is past tense of rise, meaning they increased. “By the appearance” would mean the increase in sales happened sometime before the new product. “With the appearance” means the increase was because of the new product. “Each winter” means the sales increased year after year. The next sentence should be something like “Since it was introduced, the most popular flavor of Y.D. has always been vanilla.” “Of course” and “as you may already know” mean the same thing, and should not be used together. Either one is ok, but only use one. Also, add the word “a” before limited edition flavor. A native speaker would say “please try them” instead of “please eat them.” “Besides” usually means you are trying to convince someone of something or add a reason why you feel a certain way. For example: If you accidentally knocked over a cup of water and your mom was angry that you made a mess, you might say: “I didn’t realize there was anything left in the cup when I tipped it over. Besides, it’s only water, so it won’t stain.” An example of the way to use the similar looking word “beside” is: “Beside the platypus, mammals do not lay eggs.” Or in a meeting, the presenter might say: “Beside the ideas I have listed, if anyone has a suggestion, please share it now.” Neither of these is correct in this situation, so just take “Besides” out, and the rest of the sentence is fine the way it is. :) Great job and I hope this helps!

Great start! Your vocabulary is correct but the sentence structure needs some improvement. “Second” means you have already discussed one topic and you want to move on to topic number 2. You said this was an introduction, so if this is the beginning, and there will be other topics, start with “First.” (If this is not the beginning you already talked about something else, then second is correct.) If you will only be discussing one topic, do not use first (or second) at all. It indicates there will be 2 or more topics. Common knowledge is not quite natural in this sentence. The concept is correct, but a native speaker would probably say “changed this perception.” You could say “Before the introduction of Yukimi daifuku, ice cream was generally considered a treat to be enjoyed only in the summer time. Yukimi daifuku changed this perception.” Native speakers might say “It’s common knowledge that ice cream melts quickly on a hot day.” We usually use “common knowledge” to point out something very obvious and to be slightly insulting if somebody did something carelss or stupid, like forget to put the ice cream in the freezer. (You would say it jokingly to a sibling or friend, or angrily in an argument, but not to someone you respect.)