Ever since it was announced in 2021, Aukus has attracted hostility and scepticism. China has consistently argued that the Australia-UK-US security pact is a dangerous move that raises regional tensions. Some western critics of Aukus suggest its central project, the provision of nuclear-powered submarines to Australia, may never happen — and delivering on this goal must be a priority to maintain the credibility of the pact.

Despite these criticisms, Aukus is gaining momentum and adherents. Recently, the defence chiefs of the Aukus nations announced that they were considering inviting Japan to participate in the development of new military technology. Justin Trudeau, Canada's prime minister, also spoke positively about developing ties with Aukus. Formal membership of Aukus for Japan or Canada — creating a Jaukus or a Caukus — is probably some way off. But it is clear that both countries see Aukus as an important strategic partner.