Asia is the largest continent on Earth.
Before going through the Weapon X process Logan lived in Japan. During his time in Japan, Logan worked with the local monks and fell in love with a woman named Yuriko Oyama. Yuriko later came to America and was turned into a cyborg and took the name Lady Deathstrike and intended to take revenge on Wolverine whom she believed was responsible for her father's death.
While with the X-Men, Wolverine grew more dangerous like a wild animal and almost killed innocent people. Logan knew that he once felt peace while he lived in Japan so he quit the X-Men to return there. However, when Wolverine arrived he discovered that a small Japanese village was being threatened by the Silver Samurai. Logan and the villagers fought back and were able to defeat Silver Samurai. Logan then returned to America and rejoined the X-Men.
When Cain Marko was in South Korea, he found the Gem of Cyttorak which transformed him into the Unstoppable Juggernaut.
At one point several captains of industry went missing in China. The Chinese government would not allow S.H.I.E.L.D. into the country so Nick Fury asked Tony Stark to unofficially send Iron Man to China to find them. When Iron Man arrived he learned that the missing captains of industry were actually a race of alien dragons that had disguised themselves as humans, and that they were planning an invasion. Iron Man then joined forces with the Mandarin and defeated the dragons.
Hulk, She-Hulk, and Betty Ross later went to China to return a mystical medallion to a Chinese man. While there they discovered a secret and ancient village called Inavrin. They learned that the leader of Inavrin had a son named Lord Scimitar who was evil. Lord Scimitar attacked Inavrin and attempted to overthrow his father and become the new king. However, Scimitar was stopped by Hulk and She-Hulk.