Wakana Dohtan
As we already learned in the Japanese Society class, the issue of Nikkei people living in Japan has been a quite controversial topic. Now it is apparently true that Japanese economy is heavily depending on foreign labor forces in a variety of places, for instance, manufacturing or agricultures. The home countries of these foreign workers are mainly from China, Korea, and the growing number of Nikkei people.
Especially talking about Nikkei people, since the new law, which enables Nikkei workers come and work in Japanese society with almost no conditions required, came into force in 1990, the number of them has been skyrocketing up until today. They usually devote themselves to unskilled and low-paid jobs which is so called 3D (Dirty, Dangerous, and Demeaning.) The reason why Nikkei people poured into Japan then were also associated with the very big economic downturn happened at the same time and mal-politics back home in large part of Latin America. Japanese government decided to accept Nikkei people because they predicted that if they have at least something in common with native Japanese like an ancestral linkage, there would be less conflicts and disagreements among Japanese society which seemed to prefer homogeneity and resulting efficiency at working place. However, this easygoing assumption turned out to be completely wrong. Even though they were “Nikkei”, their attitudes, culture, or speaking languages were totally Peruvian, or Brazilian, therefore, they had great difficulties of integration and there appeared so many problems like lack of necessary information, housing problems and cultural clashes with Japanese neighbors.
For such a situation, a friend of mine told me that Japanese government does not have to do anything to support them. He insists that Nikkei people were coming to Japan spontaneously with their own will and that they may not get any jobs if they stay in their home countries. In comparison with their homeland, Japan must be much better for them, therefore Japanese government should not take any extra responsibility for them.
Well, that could be one reasonable opinion. I personally, however, believe that as long as Japanese government is economically willing to accept cheap labor forces to fulfill the demand at working site, they also have to prepare and supply them basic circumstances for coming immigrants, for example by providing them with the Japanese-learning class, multilingual information, some sorts of social security, or checking system that investigates if their working contracts with the company is legal, all of which are greatly important for foreigners to survive in Japan. However, the reality is completely insufficient. Especially after the economic crisis in 2008, Nikkei people have been suffering from sudden and wrongful determination or unexpected cut down on their salary.
Self-help is the theory which is applicable only to the majority I think. Thus Japanese government should take it into account that Nikkei people are not only cheap labor forces but also “human beings”.
JAPANsociology 
that is a difficult question that you pose here. i always wonder what clearly parts japanese and other nationality. it can be said to other nationalities but in the world where nation states are common, it is the only way that a state can select people.
i am aware that many nikkei people are coming to japan to gain from its developed economy. i would like it if immigrant workers could have better living condition here, but i think it difficult because japan continues to grow its debt. we might have to see what will come when more immigrant workers come in japan.