What was most striking was that Kitagawa’s sexual abuse had been concealed and never surfaced—only after the BBC first reported it, did the Japanese news outlets finally begin to cover it. What was most striking was that Kitagawa’s sexual abuse had been concealed and never surfaced—only after the BBC first reported it, did the Japanese news outlets finally begin to cover it.

What was most striking was that Kitagawa’s sexual abuse had been concealed and never surfaced—only until after the BBC first reported it did Japanese news outlets finally begin to cover it. What was most striking was that Kitagawa’s sexual abuse had been concealed and never surfaced—only until after the BBC first reported it did Japanese news outlets finally begin to cover it.

What was most striking was that Kitagawa’s sexual abuse had been concealed and never surfaced—; only after the BBC first reported it did Japanese news outlets finally begin to cover ithe story. What was most striking was that Kitagawa’s sexual abuse had been concealed and never surfaced; only after the BBC first reported it did Japanese news outlets finally begin to cover the story.

Replaced dash with semicolon for better connection between clauses. Added “the story” for clarity.

Johnny & Associates is a boy-pop idol (or boy group) agency that everyone in Japan knows, having produced countless nationally beloved male idols—SMAP, ARASHI and so on—who’ve captivated a great many women. Johnny & Associates is a boy-pop idol (or boy group) agency that everyone in Japan knows, having produced countless nationally beloved male idols—SMAP, ARASHI and so on—who’ve captivated a great many women.

Johnny & Associates is a boy-pop idol agency that everyone in Japan knows, having produced countless nationally beloved male idols—SMAP, ARASHI and so on—who’ve captivated a great many women. Johnny & Associates is a boy-pop idol agency that everyone in Japan knows, having produced countless nationally beloved male idols—SMAP, ARASHI and so on—who’ve captivated a great many women.

Johnny & Associates is a boy-pop idol agency that everyone in Japan knows, having produced countless nationally beloved male idols—SMAP, ARASHI and so on—who’ve captivated a great many womenfemale fans. Johnny & Associates is a boy-pop idol agency that everyone in Japan knows, having produced countless nationally beloved male idols—SMAP, ARASHI and so on—who’ve captivated a great many female fans.

Johnny & Associates is a well-known Japanese boy-pop idol agency that everyone in Japan knows, havinghas produced countless nationally beloved male idols—SMAP, ARASHI and so on groups—such as SMAP and ARASHI—who’ have captivated a great many womenmany fans. Johnny & Associates is a well-known Japanese boy-pop idol agency that has produced countless nationally beloved male idol groups—such as SMAP and ARASHI—who have captivated many fans.

“Everyone in Japan knows” is informal and vague; “well-known” is more formal. “Male idols” changed to “male idol groups” because SMAP and ARASHI are groups. “And so on” is vague; replaced with “such as” for clarity. “A great many women” simplified to “many fans” for neutrality and professionalism.

FromSince around 1970, ithe agency dominated Japan’s entertainment industry for over half a century, but its reign came to an enfifty years, but its dominance ended in 2023 when the BBC reported that the late founder, Johnny Kitagawa, had sexually abused male talents under his management. Since around 1970, the agency dominated Japan’s entertainment industry for over fifty years, but its dominance ended in 2023 when the BBC reported that the late founder, Johnny Kitagawa, had sexually abused male talents under his management.

“From around 1970” changed to “Since around 1970” to indicate continuous dominance until a point. “Half a century” replaced with “fifty years” for clarity and formality. “Its reign came to an end” is dramatic; “its dominance ended” is more neutral.

For Japanese women in their twenties through forties—who spent their youth watching Johnny’s idols on TV and attending their concerts—this revelation by the BBC was nothing short of an event that turned their, and indeed the entire Japanese public’s, perception of Johnny’s idols 180 degrees. For Japanese women in their twenties through forties—who spent their youth watching Johnny’s idols on TV and attending their concerts—this revelation by the BBC was nothing short of an event that turned their, and indeed the entire Japanese public’s, perception of Johnny’s idols 180 degrees.

You can also say: "[...] that completely changed theirs, and the entire Japanese public's perception of Johnny's idols."

For Japanese women in their twenties through forties—who spent their youth watching Johnny’s idols on TV and attending their concerts—this revelation by the BBC was nothing short of an event that turned their, and indeed the entire Japanese public’s, perception of Johnny’s idols 180 degrees. For Japanese women in their twenties through forties—who spent their youth watching Johnny’s idols on TV and attending their concerts—this revelation by the BBC was nothing short of an event that turned their, and indeed the entire Japanese publics, perception of Johnny’s idols 180 degrees.

For Japanese women in their twenties througho forties—who spent their youth watching Johnny’s idols on TV and attending their concerts—this BBC revelation by the BBC was nothing short of an event that turned their, and indeedcompletely changed their perception, as well as that of the entire Japanese public’s, perception of, toward Johnny’s idols 180 degrees. For Japanese women in their twenties to forties—who spent their youth watching Johnny’s idols on TV and attending their concerts—this BBC revelation completely changed their perception, as well as that of the entire Japanese public, toward Johnny’s idols.

“Twenties through forties” changed to “twenties to forties” for natural expression. “Nothing short of an event that turned … 180 degrees” is wordy; simplified to “completely changed their perception.” Clarified “their, and indeed the entire Japanese public’s” to “their perception, as well as that of the entire Japanese public.”

MORE SUCCINCTLY: In other words, the Japanese public learned the truth for the first time through thea BBC’s reimported report. MORE SUCCINCTLY: In other words, the Japanese public learned the truth for the first time through a BBC report.

In other words, the Japanese public learned the truth for the first time through the BBC’s reimported report being re-imported into Japan. In other words, the Japanese public learned the truth for the first time through the BBC’s report being re-imported into Japan.

“Reimported report” is unclear; clarified as “report being re-imported into Japan.”

This is said to bewas likely because Johnny & Associates controlled the Japanese media, preventing any negative information about Kitagawa from being published. This was likely because Johnny & Associates controlled the Japanese media, preventing any negative information about Kitagawa from being published.

This is saibelieved to be because Johnny & Associates controlled the Japanese media, preventing any negative information about Kitagawa from being published. This is believed to be because Johnny & Associates controlled the Japanese media, preventing any negative information about Kitagawa from being published.

“This is said to be” changed to “This is believed to be” for more formal and appropriate reporting tone.