来 and 学, from the original example, are both simplified characters (the traditionals being 來 and 學). I was a little bemused to see them in an example of Japanese text, but it turns out they are the common Japanese characters as well. Japanese has its own set of simplifications ( https://en.wikipedia.org/wiki/Shinjitai ), often overlapping with the Maoist simplifications.

In a different pattern, mainland China simplified 龍 to 龙 while Japan simplified it to 竜. Despite being a "simplified" form, 竜 is actually the oldest of those three characters.

>> For those who don't know Japanese, only following my rule, can you identify the Japanese characters in the sentence above?

I would technically meet that requirement, but knowledge of Chinese makes the question pretty easy regardless of knowing Japanese. ;)