This is why I love Japan. While Americans stockpile handheld weapons and survival gear for the zombie apocalypse, the Japanese are preparing for the REAL threat: giant radioactive monsters.
Kuratas is a 12' 5" tall, nearly 10,000 pound, fully-functional Mecha built by Suidobashi Heavy Industry at a cost of 1.4 million dollars. It can be controlled from within its one-man cockpit or remotely from a 3G smartphone. It fires both rockets and 6000 rounds of ammo/minute.
More details about the debut of Kuratas at WonderFest 2012 here and here. These guys are definitely ready for Godzilla Wednesdays: