Has any aspect of Japanese culture ever influenced Chinese culture?

No, Japan had an isolationist policy from the 1630s through 1853. https://en.wikipedia.org/wiki/Sakoku https://en.wikipedia.org/wiki/History_of_Sino-Japanese_relations Before that, the Japanese were best known as pirates, though those were of mixed origins. https://en.wikipedia.org/wiki/Wokou

Chinese borrowed good amount of modern loanwords from Meiji Japan: 電話 (telephone), 共産主義 (communism), 抵抗 (resistance), 文化 (culture), 経済学 (economics), 時間 (time), 学士 (bachelor's (degree)), 交通 (traffic), and going on...   Edit: I apologize for misreading. China adopted paper folding fan from Asuka Japan, as far as I know.   Edit 2: my mistake, 経済学 means economics, not political science.

Absolutely. One doesn't need to go back to ancient history for clues of cultural influence from across the pond. While it is true that most of the influencing happened from the Chinese side, in recent times, the reverse has happened in a more subtle manner. For example, Chinese manga/anime culture is hugely influenced by the Japanese counterpart. Prior to the 80's, China virtually had no manga/anime industry, or at least in the modern sense. Started in mid-80, China allowed selected Japanese animations to be aired in China, subsequently, a whole generation of Chinese kids were exposed to high quality Japanese anime/manga, such as Dragon Ball series. Overtime China developed its own art style which is very much so informed by the Japanese style and direction. Similarly, J-pop culture has influenced an entire Chinese generation on the way they dress, do make up and stylise. With virtually no adult industry in China, hordes of lonely Chinese young men depend on Japanese porn industry for entertainment, some porn stars of Japanese origin even achieved celebrity status in China, more so than in their home country. Those changes are very subtle, because the Chinese culture itself is a very resilient one and many Chinese are resistant to admitting the change happening in reverse. However those are all changes nontheless.

I can think of one thing: While living in Taiwan, there was a Sushi place downstairs.  It had like 500+ varieties of Sushi/Sashimi dishes, more variety in one place than I've seen anywhere in Japan.  I mean, they took that Sushi ball and ran with it man.  I do respect and recognize the native Taiwanese culture/language.  I lived in Okinawa for 6 years too, and the native Okinawan's remind me of native Taiwanese, so I love them both more than mainland Japan or China, maybe, or both the same.  But in Taipei, there was mostly Mandarin going on, so I consider Taiwan as Chinese, I've traveled the whole Island, it's small enough, and mostly I came across Taiwan Mandarin.  Although I love the Beijing Mandarin accent much better.  Similar to Okinawa, I consider Okinawa to be Japan, just these Islands of Taiwan and Okinawa are special to me.   So in Taiwan (or Formosa-from Portuguese) anyway, there seems to be Japanese influence there (sushi.)  I don't consider the Japanese language learned by Chinese in Taiwan, due to occupation of war, any kind of positive influence at all, even though Taiwan cooperated with Dutch/Japanese occupiers.  But the Sushi, definitely came from Japan.   Oh, Karaoke too, is popular in Taiwan, which came from Japan--I have first done Karaoke in Taiwan, by-the-way.  In fact, Karaoke is popular with the Chinese, American, and Vietnamese friends I have in the USA. I just don't like occupation or such aggression.  Even though I am an American--Japanese/Russian/English/French/Irish/German/Blackfoot Indian too, and have blood on several sides of the equation of occupation/colonization.  So, I understand Japan was first long ago populated from China anyway (just like Korea,) then they became alienated from the mainland and Japanese/Koreans was the result.  So although I am part Japanese, I feel connected with China.  But I love my Korean friends way more.  And my Vietnamese friends still way more than that--I think, maybe not.  So China influenced Japan, and Japan influenced China. And there was a Pizza Hut on the first floor where I lived in Taipei too...So the USA where I am a citizen, influences things  too, haha.   I like Hong Kong (and the Cantonese language) the best, out of the whole of all of Asia I've explored though.  Except Burma.  Just because of their cool language, and their Mohinga, a food dish I can make myself now, and won't share the recipe with anyone.  You know, I may like Hong Kong and Burmese Mohinga, but for people?  Vietnamese has my heart.  After Koreans.  Yeah.  Koreans are my favorite as a people and food (not in a cannibalistic way.)

汉字。Kanji. Chinese character. In Chinese perspective, Japan borrowed Chinese characters since around Tang Dynasty and then progressively developed their own language. This is a typical view alluding that China cultivated Japan in a one-dimension way. It is right and wrong. Ancient China influenced Japan in several significant aspects while in a MODERN time it is China kept importing everything they were eager to absorb from Japan, a rising power as well as an Asian example of modernization. Modern Chinese language, which tells big difference  between Classical Chinese and Vernacular Chinese, is composed of large amount numbers of vocabularies coined by Japanese Kanji. In other words, most commonly-used Chinese vocabularies (especially used in a Communist political context or narrative) are actually sharing Japanese words and Japanese meaning of a true Japanese language devoid of Chineseness. This may causes a fabulous irony in Anti-Japanese nationalism campaign in China mainland because not a single Chinese could ever speak Mandarin if they take the boycotts of Japanese products serious.