Mizuno Corporation

Mizuno Usa, Inc.

Yasuyuki Ohta

Tetsuya Kanayama

David Gregory Llewellyn

Kazuhiro Doi

Kazuya Ishida

Naoki Yoshikawa

Takeshi Naruo

Yohei Yamashita

Richard Delvac

Takashi Kimura

Kei Tsuji

Yohei Yoshida

Yuki Yamada

Daisuke Kogawa

Yoshinobu Watanabe

Kensuke Maenaka

Noriyuki Tabuchi

Yukihiro Teranishi

Naoya Joichi

A swing analysis device for analyzing a swing of a user of a golf club accepts input of acceleration information, angular rate information, and strain information of a shaft of the golf club, detected by a sensor attached to the shaft, calculates attitude information of the golf club in a swing period, based on the acceleration information and the angular rate information, corrects the attitude information of the golf club at impact, based on the strain information of the shaft, and displays the corrected attitude information of the golf club on a display.

Swing analysis device, swing analysis method, and swing analysis system

A running form diagnosis system capable of automatically scoring a running form of a runner is provided. The running form diagnosis system obtains body motion information as to a test subject running on a treadmill, and calculate a running form score of the test subject by applying obtained characteristics to a given operation expression. The operation expression is generated based on correlation between characteristics of a plurality of test runners and comprehensive evaluation given by an expert with respect to the plurality of test runners.

Running form diagnosis system and method for scoring running form

A bat selection device includes: a parameter input unit which receives an input of a swing parameter value relevant to swing of a batter, for each of at least two or more bats having moments of inertia different from one another swung by the batter at an object, of a plurality of bats; an estimation unit which estimates the swing parameter value corresponding to each of the plurality of bats based on each received swing parameter value; and a selection unit which calculates an index parameter value indicative of an index for selecting a bat suitable for the batter from the plurality of bats, for each of the plurality of bats, based on the estimated swing parameter value corresponding to the bat, and selects the bat suitable for the batter based on the index parameter values.

Bat selection device and bat selection method

An iron golf club head includes: a head portion; and a badge portion adhered to the head portion. The head portion includes: a face surface; and a back surface located behind the face surface. The badge portion is adhered to at least one of a first largest amplitude region where an amplitude in a fourth-order vibration mode of the back surface is the largest and a second largest amplitude region where an amplitude in a fifth-order vibration mode of the back surface is the largest. As a result, there can be obtained an iron golf club head and an iron golf club, in which by suppressing decrease in resonant time of the hitting sound and reducing the sound pressure of the hitting sound, the hitting sound and the hitting feeling can be improved.

Iron golf club head and iron golf club

An iron golf club has a club length L measured in accordance with 60-degrees method of at least 36.5 inches, and it includes: a carbon shaft; a weight attached to said carbon shaft; a grip attached to one end of said carbon shaft; and a head attached to the other end of said carbon shaft. Sum total of mass of the carbon shaft, the weight, the grip and the head is at least 0.3996 kg and at most 0.4197 kg. A value r/L, where r represents a distance from an upper end of the grip to the center of gravity of the iron golf club, is at least 0.765 and at most 0.795. Thus, an iron golf club realizing improved easiness of swing can be provided.

Iron golf club

Back design for hybrid golf club heads

Growing community of inventors

Osaka, Japan

Yasuyuki Ohta