[ImpactBreaker]

ayu has lost the hearing on the left ear . She doesn't mention how things are on the other ear, but I'm assuming it is still working fine.

For that matter I am a little skeptical that acoustic trauma was one of the main reasons. When you listen to LOUD sounds, BOTH ears get affected equally, unless you use a one ear headphone or the likes. Concert exposure to sound expose both ears and damage them at almost the same extent, but in the case of ayu only one ear was clearly affected. Another thing against acoustic trauma is because ayu is a FAMOUS ARTIST on a FAMOUS label. It's clear that avex will take the proper cautions to avoid occupational exposure on a unhealthy enviroment, and I believe they provide the proper equipment and measures to avoid that or else they're at a great risk for being sued for that. I'm sure ayu is well aware of that, and she wouldn't insist on damaging her ears just for the sake of fans. For real, I believe ayu to have more self love (and intelligence) than that. On the other hand, hjer oprofessional exposure are strong factor that make this possibility a little stronger. Still very weird that it would affect one ear only and ayu would still be willing to keep on the exposure though.

About the fall, I doubt it. First of all, there are no records of her suffering head trauma. The fall she suffered most likely didn't hurt her head. Plus for a head trauma to cause damage to one ear, most likely you'd have to suffer a very serious damage in your head so it would cause fracture of cranial bones and damage to the cochlea. There are obviously no records of anything simillar.

Meniere Disease: it could be a reason. It often affects one ear all of a sudden, with remissions and recurrences. It often causes vertigo, which would explain why she fell on stage, and could even explain some "possible drunk" tabloid pictures of ayu (she could be having attacks of vertigo instead so she needed the help of her bodyguards to walk and the tabloids assumed it to be alcohol and took a shot of it, who knows). It's also associated with tinnitus, a suymptom ayu has referred in the past. It can lead to progressive loss of hearing which would also fit her symptoms.

Ear infection => viral infections sometimes cause abrupt neurosensorial ghearing loss that may or may not be permanent. It could be an explanation for her current problem. Bacterial infections usually cause conductive damage to the ear, which can lead to deafness, however, conductive hearing loss is usually TREATABLE and the person recovers hearing after surgical procedures. She mentions it's not treatable so the hearing loss is likely to have been neurosensorial, and for that matter if it was an infection, it was viral. However the loss would have been abrupt and not gradual. By the way she tells it, it sounds as if she gradually lost hearing through these years.

Medications: certain antibiotics and analgesics. I don't think she's used ototoxic antibiotics to treat her "ear infections". Analgesics, if she suffer from some chronic pain, but I don't think she does

Tumors: It could be a remote reason imo, but she didn't mention anything about undergoin surgery or anything like that, anyway.