Given the timing of events, it is hypothesized that the KWP decided to adopt a policy of kidnapping Japanese and using them in terrorist activities after the 1974 presidential assassination attempt in Seoul. There were never any kidnappings of couples prior to that. A large project team directed by the KWP was formed to oversee North Korean agents' kidnapping of Japanese from inside Japan, but considerable training was essential for successful operation. Second, there would be no need to locate marriage partners for them during their captivity in North Korea. Obviously one wonders what these kidnapped Japanese are being used for.
Kidnappings take the following four patterns.
The third pattern is to steal someone's identity. Then Shin came back into Japan and assumed Hara's identity in order to obtain a Japanese passport and conduct spying activities until he was arrested in South Korea in 1985. There are two other cases similar to this. The fourth pattern is the kidnapping of Japanese studying or vacationing in Europe. These persons' passports are used to forge passports which are given to North Korean agents for use in their spy activities.