Tom Hanks

Lawrence Whatley Bourne III

John Candy

Tom Tuttle

Rita Wilson

Beth Wexler

Tim Thomerson

John Reynolds

Gedde Watanabe

At Toon

George Plimpton

Lawrence Bourne Jr.

Ernest Harada

Chung Mee

Allan Arbus

Albert Bardenaro

Xander Berkeley

Kent Sutcliffe

Ji-Tu Cumbuka

Cicero

Chick Hearn

Announcer

Virginia Kiser

Evelyn Bourne

Clyde Kusatsu

Souvanna

Shakti Chen

Lucille

Professor Toru Tanaka

Sumo Guard

Harry Yorku

Al Pe

Doris Day

Self (archive footage) (uncredited)

Rock Hudson

Self (archive footage) (uncredited)

Marilyn Monroe

Self (archive footage) (uncredited)