Surname Iwahana (Iwahana 
) , around the world, is an extremely rare cognomen. The last name Iwahana is habitual in Peru, where it is a very rare surname, Canada, where it is an extremely rare surname, and the United States.
Ko, Koichi, Hiroki, Hideki, Yoshio, Mitsugi, Shigeru, Seiichi, Atsushi, Katsumi, Susumu, Kazuhiko, Kiyoshi, Takashi, Tadashi, Tetsuya, Hiroshi, Hideaki, Toshiaki, Nobuyuki, Hiroyuki, Kenichi, Shigeo, Saburo, Masami, Go, To, Ei, Aki, Gen, Saki, Akio, Koji, Kumi, Lucy, Toru, Masao, Sumie, Akira, Kazuo, Kaoru, Jitsu, Tamao, Takeo, Teruo, Yukio, Nobuyoshi, and Yoshiharu