In 1979, Iwami Toshio Harukatsu enters the Hyoho Niten Ichi-ryu dojo of Imai-soke, thanks to the recommendation of Miyamoto Nobuo, the 13th generation descendant of Miyamoto Iori, son of Miyamoto Musashi.
In 2001, Iwami-soke is given Menkyo Kaiden (certificate of full transmission of teachings) by Imai-soke. This is the highest level of ability in the ryu, and confers that all teachings have been passed to him.
In 2003, he is named by Imai-soke as 11th headmaster of Hyoho Niten Ichi-ryu.
Today, he works tirelessly to improve his understanding of the swordsmanship of Miyamoto Musashi and to the development of his students, both at hombu in Kokura, Kyushu and those abroad who practice Hyoho Niten Ichi-ryu.