The best of course would be to train in Japan. There are three dōjōs, one in Nara, one in Higashiōsaka and one in Nagoya, where training is held regularly. Addresses, training hours and contact data can be found at the Japanese site of the Hōzōinryū.
Outside Japan the only place offering Hôzôinryû Takadaha Sôjutsu training on a regular base is located in Hamburg/Germany:
Alster Dojo e.V.
Tel. / Fax: +49 40 - 560 085 95
monday 17:00 - 19:00
thursday 17:00 - 18:00
saturday 10:00 - 12:00 until further notice
Everyone interested in Hôzôinryû Sôjutsu is always welcomed to visit the regular training sessions but prior announcement of such a visit either by phone during the Sōjutsu training hours at the dōjō or here would be highly appreciated.