"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 (My Wedding and Other Secrets), Robin Scholes (Once Were Warriors), Toa Fraser (No. 2) and Trevor Haysom (In My Father's Den).
"Delegates are looking for New Zealand partners to make English language films that appeal to wider markets than their own," 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 across the region.
Delegates will also be taken to Wellington and Queenstown this week, to look at what opportunities the regions offer.
The local screen industry employs about 6700 people and is worth more than $2.8 billion annually.
This year's immigration law changes removing the requirement for guild or union referrals for foreign actors coming here for 14 days work or less and for those part of official co-production teams will make it easier for film makers to bring in foreign talent. .
Mr Brook said the world economic power had shifted to Asia in recent years, and New Zealand was well-placed to seize new opportunities the region offers.
China's box office grew 62 per cent last year, and the country is set to become the second-biggest movie market behind the United States.