Toyota Motor Corp. retained its position as Japan's biggest corporate income earner in calendar 2004 for the fifth consecutive year, Kyodo News reported, citing credit research agency Teikoku Databank.

Toyota reportedly declared 793.2 billion yen in income to tax authorities thanks to strong vehicle sales both at home and overseas.

Honda and Nissan Motor also scored strong earnings in the year, with their declared incomes ranking fifth and ninth, respectively, the report added.