Japanese shows have been coming through recently with that aro and ace rep! Thought I would put together a list for anyone interested in seeing more aro, ace and aroace characters. Feel free to add on if I've missed any!
Koisenu Futari (TV series) - Takahashi Satoru and Kodama Sakuko
You've probably heard of this show. It has not one but two explicitly aroace characters with very different personalities. The entire show revolves around them figuring out life after identifying as aroace. Takahashi is also canonically touch-averse.
Kimi no Hana ni Naru (TV series) - Onodera Takara
I have not watched the show personally and so am not sure whether he's aro or aroace. Every time I see the translations, they are different, so will update as and when I watch the show for myself. But he does explicitly say he does not experience romantic attraction. This show is also written by the screenwriter of Koisenu Futari.
Cherry Magic (TV series and Movie) - Fujisaki Nozomi
Another gem from the creator of Koisenu Futari. Fujisaki is canonically aroace.
Konya Sukiyaki Dayo (TV Series) - Asano Tomoko
Again, I'm not sure whether Tomoko is aro or aroace but she explicitly says she is aromantic in the show and that she doesn't understand romantic attraction.
Raise de wa Chanto Shimasu (TV Series) - Takasugi Ume
The main character's best friend is explicitly aroace. She says she "isn't capable" of experiencing romantic attraction, admits to never having had sex, and is uncomfortable with people being attracted to her.