Answer:
Thought Police in Japan
Explanation:
Considering the available options in the question, the name that sounds most ominous is "Thought Police in Japan."
Since the word "Ominous" is defined as something that is always present or exists with alarming characteristics.
Also, a "thought police in Japan" would be a kind of policy that would be able to know whatever any man is thinking or intend to do, regardless of whenever or wherever they are.
Hence, in this case, the correct answer is "Thought Police in Japan."