THUNDER KATANA BLADE is a historic object of the second world war (WW-II) in the pacific and southeast asia. According to the myth of this blade in the WW-II era was used by a japanese imperial army officer. The myth states that for anyone who holds this katana blade, will have a long life, if this blade is used to kill. Isue circulated that this katana blade is hidden somewhere in the wilds of southeast asia. Due to the myth, the katana blade is the target of many parties. Especially from groups of international criminal organizations as well as collectors for personal enjoyment. In anticipation of adverse effects, if the katana blade is owned by irresponsible parties, then THE FORECASTER duty to track the existence of katana blade, as well as placing it in the museum of international standard, so useful for science and history education.