Вот на 2002 год инфа по обороту:
Interesting Worldwide sales figures in US dollars for 2002 comparing Japanese and USA companies.
YAMAHA CORPORATION $4,067,790,000
FENDER MUSICAL INSTRUMENTS $275,000,000
YAMANO MUSIC COMPANY, LTD. $255,000,000 Fender Japan, Epiphone Japan
GIBSON GUITAR CORP. $125,000,000
HOSHINO GAKKI MFG. CO., LTD. $119,000,000 Ibanez, Tama
KANDA SHOKAI CORPORATION $48,000,000 Fender Japan, Greco, Zemaitis
Думаю к 2008 г. Ibanez точно обогнал.