"This country has everything, from location to very talented creative people, especially in special effects and post production," said Tomiyama, who is president of Toho Studios.
"Movies like Lord of the Rings are world class, and I want future Japanese producers to learn from the best."
About 30 delegates from nine countries, including China Film Bureau deputy director Mao Yu, leading Korean producer James Choi and James Liu, founder of Taiwan's Joint Entertainment, are attending the symposium.
"We are facing one big global market nowadays," said Mr Liu.
"Frankly, it [the symposium] is one of the most efficient ways to complete that mission."
The forum includes sessions with Film NZ chief executive Gisella Carr, South Pacific Pictures chief executive John Barnett and local producers Roseanne Liang, Robin Scholes, Toa Fraser and Trevor Haysom.
"Delegates are looking for New Zealand partners to make English language films that appeal to wider markets," said network president Paul Carran.
Film Auckland manager Michael Brook said the symposium aimed to "explore key issues alongside the leaders of Asia's booming film industry" and make connections and generate new projects and partnerships.