Ken Ishikawa
He was a Japanese manga artist and renowned as the co-creator, with Go Nagai, of the Getter Robo anime series, as well as four of their subsequent manga continuations.
He collapsed at a dinner banquet, after a day of golf, and was rushed to the hospital where he was pronounced dead according to his mentor, Go Nagai.
He died on November 15, 2006, aged 58.
Mangaography

Garou Densetsu: Senritsu no Maougai
Ken Ishikawa

Getter Robo
Go Nagai, Ken Ishikawa

Yagyu Jubei Dies
Fuutarou Yamada, Ken Ishikawa

Getter Robo Go
Ken Ishikawa

Shin Getter Robo
Go Nagai, Ken Ishikawa

Neo Devilman
Shouu Tajima, Masaomi Kanzaki, Go Nagai, Miki Tori

Makai Tenshou
Fuutarou Yamada, Ken Ishikawa

Cutie Honey THE ANOTHER
Go Nagai, Ken Ishikawa, Yuu Okazaki

Getter Robo Arc
Go Nagai, Ken Ishikawa

Getter Robo G
Go Nagai, Ken Ishikawa

Getter Robo High
Go Nagai, Ken Ishikawa, Bingo Morihashi, Jill Drill

Samurai Spirits: Shimabara Amakusa Jashin Shiro Kouryaku-hen
Ken Ishikawa

Majuu Sensen
Ken Ishikawa

Mazinkaiser vs Shin Getter Robot
Go Nagai, Ken Ishikawa, Moo.Nenpei, Masanao Akahoshi

Super Robot Retsuden
Go Nagai, Ken Ishikawa

Apocrypha Getter Robo Darkness
Go Nagai, Ken Ishikawa, Hideaki Nishikawa

Getter Robo Hien: The Earth Suicide
Naoto Tsushima, Go Nagai, Ken Ishikawa

Kyomu Senki
Ken Ishikawa

Samurai-tachi no Meiji Ishin
Ken Ishikawa

Eurasia 1274
Ken Ishikawa

Seiten Taisen Flieder Bug
Ken Ishikawa

Shin Change!! Getter Robo Crater Battle
Go Nagai, Ken Ishikawa

Amon Saga (ISHIKAWA Ken)
Baku Yumemakura, Ken Ishikawa