Cons of English as the Official Language

I would like to discuss the examples of why english should not be the official language of Japan. Although as shown in past posts, making english the official language of Japan is beneficial in many ways. However.....

Another country which carries this issue is, believe it or not, America. America as a country, does NOT have an official language. This is most likely because of how it is not really important to that country to make it a official language. For America, it is probably because english is already spoken by most of the citizen.

This is not the case for Japan. For Japan, the main problem is mostly the idea that if english becomes the official language of Japan, part of education would be devoted to learning english, and may affect Japan's education system. As a result, it is feared that it may delay japanese education to children. Learning another language gives the learner a wide view to society, but each language also has a tight link to the culture in that country. A different language may cast unpredicted result on the culture.