Does a biography of S. Otsuka exist?

Hi all,
I've been looking around for biography of the founder of Wado Ryu but have had no luck. (Lots of mini-biogs on the web, but no book).
Does anyone know if one has been written, please?

Thanks,
Shen

This is one book I would like http://www.amazon.com/exec/obidos/ASIN/0...1628925-8367035

Don't think there is a biography
Sharon