Wasn't for the Japanese, they had been using it for over ten years.
MPI in 1977?
Bosch, Bendix & Rochester injected cars go back to the 1950's,
but multiport,
as in a separate fuel injector for each cylinder was still new in 1987.
The first Multiport Injection I can remember was the TPI Chevy's in 1985, for Corvettes, Camaro's & Firechickens,
then the Mustangs got Sequential Fuel Injection in 1986.
I can remember Bosch injected VW's in the early 1980's,
but I don't think they used separate fuel injectors like the Jeeps, Chevy's & Mustangs were using by the mid 1980's.
My 84 Nissan had Multipoint fuel injection, a 75 280z had multipoint fuel injection, 1980 VW+ Vanagons all were MP fuel injected(hell they were fuel injected before they were water cooled).