The transport ministry is considering punishing him, ministry officials said Saturday, adding that the air traffic controller, aged around 50, posted 12 images, which also included a flight plan for a US unmanned reconnaissance aircraft deployed to collect data on the Fukushima Daiichi nuclear power plant crippled by the March quake and tsunami.
The transport ministry has launched an investigation and is considering taking disciplinary action against the official for abuse of confidentiality, the ministry officials said.
Other images showed photos of inside the control tower and a man believed to be the air controller himself.
All the images have already been deleted from the blog.Obama visited Japan on November 12 to attend the summit meeting of Asia-Pacific Economic Cooperation forum in Yokohama.