Apparently the government can stop this for any reason... hopefully if it is true, they do.
'The Foreign Exchange and Foreign Trade Control Act regulates investments by foreign investors. Investments into certain companies that engage in businesses specified by the act and its relevant regulations and ordinances are subject to the government’s prior approval, and the government has broad discretion as to whether approval of a given investment is granted. Foreign investors may not implement a transaction until the 30-day period from the filing has expired; but usually such period is substantially shortened. However, the government may extend this waiting period or even deny the transaction if (for example) the subject company is highly regulated due to national security concerns (eg, relating to the military, nuclear, aviation, media or telecoms industries).
Investments from foreign investors in businesses not subject to prior approval by the government are nevertheless subject to post-closing notification to the minister of finance by the 15th day of the following month of investment, excluding any acquisition of less than 10% of the shares of a listed company, which is not subject to post-closing notification.'