2. they have close ties to North Korea. When they met with North Korean leader Kim, it is estimated that as much as $4.5 billion was given to North Korea as donations. This means that the Unification Church is also part of the source of funds for North Korea's nuclear missiles.
3. The Unification Church's doctrine is very anti-Japanese and Korean nationalismistic. For example, according to their dogma, Japan, as an Eva country, must devote all of its wealth to Korea, and the language of all nations must be unified in Korean, etc. Please note that these anti-Japanese doctrine has actually caused damage like high donations.
After all, from the Japanese perspective, the Unification Church's problem is not just a religious issue, but also a security threat.