There are many reasons to study in Japan. The first and foremost is the cultural experience. Japan has one foot firmly rooted in East Asian culture but they also have a strong influence of Western and American culture. However on top of that you have a truly unique Japanese culture that don’t resemble anything else.
Study in Japan is extremely open to international students; more than 130,000 foreign students study in the country every year.
Japan plans to more than double the number of international students by 2020 in part by offering more programs in English.
There are definitely a lot of reasons why he left you.
One may be because the bond that connected you two when you first started might not be there anymore.
But there is no need to despair as these ties that bind you can be fixed and even strengthened.