Nippon Steel Corporation

The Yokohama Rubber Co., Ltd.

Asahi Kasei Kogyo Kabushiki Kaisha

Fourteen Co., Ltd

Takamitsu Takebayashi

Kenichi Miyazawa

Mitsutake Teramoto

Shinkichi Saito

Akihiko Kusano

Seiichi Soeda

Etsuji Kakimoto

Masaya Fukuda

Shigeru Chino

Golf club head and method for producing the same

A set of iron golf clubs, in which a grip is disposed at one end and a club head is disposed at the other end of a shaft, the length of the shaft is gradually decreased and the loft angle is gradually increased from a longer iron to a shorter iron, wherein the structure of the club head is made such that a hollow structure is taken for longer irons and a solid structure is taken for shorter irons in which the volume of hollow portion is gradually decreased as the number of the club changes from side of the longer iron to the shorter iron. The sole width of the club head gradually increases as the number of the club changes from the shorter irons to the longer irons.

Set of golf club irons

Growing community of inventors

Musashino, Japan

Takamitsu Takebayashi