If I ask you do you have any Japanese friend? Most of the foreigners who live in Japan more than 5 years will reply "NO". Its amazing thing, isnt it? But why? "My loneliness is killing me"..the most common dialogue here? The answer is to be as friendly as possible with the Japanese people. No matter you are not good at Nihongo. The approach is the main thing. Some are shy but gradually you can become friendly.So start today and make many friends and you will be no more in the lonely planet!