Iwasaki Soke
From Openwaterpedia
Iwasaki Soke (or Iwasaki Hisashi Sensei) is the Hereditary Headmaster of Kyoto's Kobori Ryu suiei-jutsu and is one of the people responsible for preserving Suieijutsu in Japan. He is a Senior Advisor to the Shodokan Martial Arts Association and one of the highest ranking martial artists in Japan.
Iwasaki Soke teaches and preserves a very rare and esteemed form of ancient bujutsu called Suijutsu (水術 or Suieijutsu), the ancient Japanese martial art of Combative swimming.
Suijutsu Video in Japanese
Suijutsu Video in English