Buying Yen in Sydney
Some research shows the better option is to put your cash into a fee-free travel card and get cash out at Post Office ATM's
In 2019 I changed my AU$ to Yen at https://www.unimoni.com/aus/our-services#foreign-currency-exchange
Aldo recommends - https://www.uaeexchange.com/aus/ - Sydney Tower Eye, Shop 2021, 100 Market St, Sydney NSW 2000 or 715 George St, Haymarket NSW 2000
https://www.kvbkunlun.com/en/index.aspx
https://www.hsbc.com.au/1/2/personal/foreign-exchange/exchange-rates
worth a read - https://www.reddit.com/r/sydney/comments/2g2eyg/best_place_to_exhange_audyen/