Rakuten Group, Inc.

Ryuji Iwaya

Tetsu Watanabe

Masahiro Kuwahara

Takumi Umemura

Yosuke Shimada

A captured video image obtaining unitobtains a captured video image in which a player making a golf swing is captured. A swing path type specifying unitspecifies at least one reference angle based on at least one of a position of a predetermined body part of the player at address or a position of a shaft at address, where the positions are specified based on the captured video image. A swing path type specifying unitspecifies a downswing angle of a club head captured in a captured video image based on the captured video image. The swing path type specifying unitcompares the reference angle with the downswing angle.

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Tokyo, Japan

Ryuji Iwaya