Mediaset/Berlusconi. Berlusconi's TVs had a massive role in importing and popularise anime in Italy (and other European countries, like in Spain), and the company responsible for the recording of the songs was owned by Berlusconi as well. So she simply worked for a single company that distributed hundreds of animated series. Mediaset even produced several albums with the theme songs from animated series https://i.discogs.com/LyMJAWm9_zjQl_o97lOogZv2NG1CsMLN5nItCM6VHuY/rs:fit/g:sm/q:90/h:350/w:350/czM6Ly9kaXNjb2dz/LWRhdGFiYXNlLWlt/YWdlcy9SLTU1NTY1/NzktMTM5NjQ2MTQ1/NC03OTAyLmpwZWc.jpeg