The Sanseito party tapped into discontent over issues galvanizing voters worldwide: inflation, immigration and a political class dismissed as out of touch.

Its leader is a former supermarket manager who created his political party on YouTube in the depths of the coronavirus pandemic and campaigned on the Trumpian message “Japanese First.”

The fringe far-right Sanseito party emerged as one of the biggest winners in Japan's upper house election, gaining support with warnings of a "silent invasion" of immigrants.