Remember in that speech that he also referred to American frontiersmen as samurai. We are different but the pursuit of the noble life and struggle are universal virtues. This is a great example of what true cross cultural exchange is, not mass migration and "muh exotic restaurants".
Man from one of the most xenophobic societies on earth recognizes that increased exposure of migrant crimes and failure to integrate in Europe has helped to remind the Japanese electorate of who they are.
i mean, the right wing in Europe helped the right wing in Japan by exposing all the dangers that multicultulturalism had caused, while Japan helped the right wing in the West by being an example of why homogenous societies works better than multicultural societies
The struggle is over there too, and it doesn't hinder us whatsoever to accidentally motivate the Japanese without even doing anything.
Besides us indirectly helping japan though, japan indirectly helped western nationalism by inventing anonymous textboards and imageboards which for a long time were absolutely the main ways we grew our ideas and disseminated. Before mossad took over those things at least, but we wouldn't be here without pre-mossad /pol/ and others.
Have either of us *directly* helped each other though? No. Just unintentionally.