The longest running manga can vary depending on how you measure it. 'Golgo 13' is another contender. It has a consistent publication record and has captured the attention of readers for a significant period. Different manga have different factors that contribute to their longevity, such as the depth of the story, the appeal of the characters, and the ability to adapt to changing reader preferences.
I'm not entirely sure which specific fanfiction holds the title of the longest running. There are so many different fandoms and a vast number of fanfictions out there. It could be in a really popular fandom like 'Harry Potter' or 'Star Wars', but without more research, it's hard to say for certain.
Well, it's quite challenging to determine the absolute longest manhwa. Some series like 'Tower of God' have been going on for a considerable time, but the landscape is constantly changing.
'One Piece' could also be considered among the longest running graphic novels. It has been going on for a long time with a huge number of volumes released so far. It has a very elaborate and engaging story that follows the adventures of Monkey D. Luffy and his crew as they search for the ultimate treasure, the One Piece. The art has evolved over the years and has a large and dedicated fan base.
Well, 'Sword Art Online' is among the longest running light novels. It has not only a long - running series of novels but also has been adapted into various anime and other media forms. 'Log Horizon' is also a long - running light novel that has a complex and engaging story which has kept readers interested for a long time.