The Nazis stole the Swastika. Ganesh wants it back.
— this picture◊
The manji is removed [from localized games] because it reminds people of swastika, as well due to sensitivity to religious symbols, which influences oversea sales. In Japan, the manji is a well known map symbol, so it's found everywhere. (...) Additionally, an attack with a rotating manji will look like a swastika from a certain angle.
—ZUN, Touhou Eiyashou ~ Imperishable Night trial version afterword