@rayshine
Hello! Yes, I can share a few examples off the top of my memory, mostly from J-drama: The best being “Ataru” from 2012, centered around an autistic man perfectly relayed by Masahiro Nakai, who helps police officers (played by goddess Chiaki Kuriyama and Kazuki Kitamura) solve cases by utilizing his talent for remembering minute details, keen problem-solving, among other ASD traits.
Another, from 2008, “Edison no Haha”. Ito Misaki plays a first-grade teacher who receives a new student that is referred to as “difficult” and later as a “prodigy”, but actually, to me, he presents very classically with Autism Spectrum Disorder. This dorama was a difficult watch, heartbreaking misunderstandings.
As a side note, by chance are you familiar with the manga “With the Light” by Keiko Tobe? There are 8 volumes, sadly cut short by the author’s passing, beautifully telling the story of raising her autistic son. This series was written in the early 00s (English translation 2011), so it relays many of the misunderstandings of autism from that time. I first read when the translation came out, although now it’s rather dated, but I still find it quite good and definitely recommend to the interested.
Back to the J-drama, from 2002, “Satorare” is about a doctor who has an unnamed malady wherein he cannot hide his feelings. While this is a fictional disorder, many of the character’s traits and behaviors are reminiscent of ASD.
This next one is perhaps debatable, Erika Toda’s character in SPEC-Birth, especially when she goes into one of her frenzied revelations, perseverating on particulars, her difficulties with social graces, among other behaviors, seems brilliantly inspired by ASD.
Oh, and the simply wonderful film from 2002, “Laundry” with Kubozuka Yosuke playing a man with a “mental disability” who presents very classic ASD.
As for K-drama, along with “Good Doctor”, the only others I can recall at the moment are the younger brother in “Shining Inheritance”, and presently in “Melting Me Softly”, Ko Mi-Ran’s little brother presents with ASD classic hand gestures (stimming), speech and motor issues, and possible fixation on FIN.K.L.
There are other K-dramas, with side or bit-part characters that aren’t revealed as autistic, but are possibly. I know I’ve thought to myself, watching K-drama these past years, “that character is likely autistic” numerous times, I just can’t remember all the wheres. And, now I feel inspired to start an ongoing list to keep track. 
