Kari Tapio Leppänen (born September 1, 1945) is a Finnish comic strip artist who has worked on the Phantom comic since 1979. Leppänen's career started in the magazine Sarjis. This was a magazine with only Finnish series. He wrote science fiction under the pseudonym Oskari. The Swedish comic strip publisher Semic became aware of his work and offered him a job as an artist on the Phantom series.

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