Despite the failure of Akira in Japan, it brought with it a much larger international fan base for anime. When shown overseas the film was a cult hit that would eventually become a symbol of the medium for the west. The domestic failure and international success of Akira (a 1988 anime), combined with the bursting of the bubble economy and Osamu Tezuka's death in 1989, brought a close to the 1980s era of anime.
Does brought a close to here mean those mentioned events (Akira, bubble bursting, and Tezuka's death) are the causes of the end of 1980s anime era (the reason why the 1980s era of anime had come to an end)? Or does it simply mean that they are just big events that happened to be in 1989, which marked the end of the 1980s era of anime?
//My interpretation is the latter. It would be weird to say that those events caused the end to a decade-long piece of the overall history. The era is defined by the years, didn't it end because that's where we decided to place the end point? If there is cause/effect nuance here, how come "domestic failure" and "international success" of an anime both affected the anime industry badly?