Toyota Jidosha Kabushiki Kaisha

Nobuhiko Soda

Hironori Aoyama

Kazuya Mikashima

Takuzo Hirano

Ichiro Yamaguchi

A piston includes: a piston head; and a piston skirt connected to the piston head, wherein the piston skirt includes wall portions protruding outward from a surface of the piston skirt, the wall portions adjacent to each other in a circumferential direction of the piston skirt are inclined in directions opposite to each other with respect to a direction of movement of the piston in a bore for the piston, and define a tapered portion, and the tapered portions are spaced away from each other in the circumferential direction of the piston skirt.

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Okazaki, Japan

Nobuhiko Soda