Not too sure if this is relevant, but its always concerned me?
According to a mojority of sources, the 'official' kata list for Wado is Pinan Shodan, Pinan Nidan, Pinan Sandan, Pinan Yondan, Pinan Godan, Naihanshi, Kushanku, Seishan & Chinto. 9 kata in total, the rest were added later and were practiced and taught by Otsuka Sensei himself
With regards to the choice of kata that are used within Wado, why did Otsuka choose to practice the Pinans and Kushanku which are concidered as having all the same techniques in them but only Naihanchi Shodan is practiced but Naihanchi Nidan and Sandan are not?
There are stories and demi-facts that the Pinans were part of one major kata. Also there is the same instances for Naihanchi katas too.
To me it seems, dare I say, contradictory to say all that is required is Naihanchi Shodan, when the same could be said for either the Pinans or Kushanku?
Can anyone name any other occasions where this occurs not just in Wado but in other schools too
I await your thoughts