If you search a little, you will find that Subaru and Robin are some of the brands of Japanese company Fuji Heavy Industries.
The 4 cylinder boxer engine on the first Subaru in the 1970'ies was developed for a small plane for a US manufacturer that went broke after the engine order fro the Japanese. Not knowing what to do with the engines, they designed a (ugly) car around it. It was a dry sump engine, not common to the automotive industry.