森永 (Morinaga) = Name of the food company
まんが (Manga) = Cartoon
ココア (Kokoa) = Cocoa
"Morinaga Manga Kokoa" or Morinaga Cartoon Cocoa. Morinaga is a well-known producer of chocolate, candy, ice cream, etc.
Not sure of the date of this tin, but we know it predates 1986. The imprint "© Walt Disney Productions" was the corporate name used on merchandise up until February 6, 1986. After that, it became The Walt Disney Company.
Images via kgeyer86.
It's possible the tin was sold at Tokyo Disneyland which opened in 1983.