Nishimura sensei 7th dan visited Sydney dojo and had a special seminar. This is one of the very basic questions from him, which no one could answer properly.
'What is the difference between Tsuki and Uchi?'
(Tsuki-- Oi-zuki, gyaku-zuki, Yama-zuki, Kagi-zuki etc.)
(Uchi -- Tettsui-uchi, Uraken-uchi, Shuto-uchi etc.)
What do you think?