Toyota is the biggest Japanese business....nothing else comes close. From what I have heard, the only Sony arm that really makes money is Sony Interactive Entertainment (Playstation), which is headquartered in the US
I honestly, don't really know how to categorize the auto-makers. But yes, Honda and Toyota and Nissan are all higher revenue generators compared to Sony. My observation is that Sony is one of the more recognizeable consumer electronics brands in the world.
But they also are way more prevalent in their home country than they are in America. We only know them for electronics, but in Japan they also deal in insurance, telecommunications and banking (and others).
But the same can be said about Samsung for example.
Maybe those articles don't account for the insurance wing. Then again, I wouldn't be surprised if insurance is their big money maker. From my experience, Insurance companies are run to nearly print money...probably one reason Berkshire Hathaway is one of the biggest corporations in the world.
Berkshire Hathaway is known for investing, and they own considerable stakes in multitudes of companies (Dairy Queen and Duracell for example).
But Berkshire Hathaway could literally not do anything and make money just on what they have in investments and the dividends they pay.
they also own GEICO and several othe insurance companies
I saw that when I googled BRK.A, where did you want to go with this?