Geisha is a type of chocolate made by the Finnish company Fazer, available as a slab, a bar, or pralines.
He asked the product development department to try out this filling with milk chocolate.
[1] Japan served as an inspiration to the product through the 1964 Summer Olympics in Tokyo, which Peter Fazer also competed in himself, in sailing.
In 2006 the wrapping of Geisha was altered to remove the characteristic picture of a geisha (or more accurately a maiko, a geisha-in-training) and the font was changed.
[2] In 2020 Fazer announced the company was considering the renaming the product.