Coincidentally, in Japan during last days of the Pacific War, the Mizuno aircraft company under orders from the Imperial Japanese Navy developed an aircraft similar to the Natter. The Mizuno Shinryu suicide-interceptor rocket aircraft was the result. It would have been armed with air-to-air unguided rockets mounted under its wings used for interception of enemy aircraft like the Natter and a nose mounted warhead to be used for a suicide attack.
http://www.spiritus-temporis.com/mizuno-shinryu/The Mizuno Shinryu (?? - "Divine Dragon") was a proposed rocket-powered kamikaze aircraft designed for the Imperial Japanese Navy towards the end of World War II. It never reached production.
Has anybody ever heard about this fighter?