No, there are only a million Japanese in America. Also, I highly doubt any Koreans would support removing a monument dedicated to Korean victims of WWII.

At 1.3Million, sure, it's possible, but I don't personally think there are enough right-wing revisionist history Japanese-Americans to have generated this much response.

Anyway, the facts support my assumption directly from the petititon. The vast majority of Japanese names on the petition do not list their location, while a handful directly report they are from Japan: Taizo H - Tokyo, Kuniko N - Fukuoka.