Through careful analysis between the new country and the old country that we see the process of assimilation and alienation and the feelings that are endemic to this process. The constant reminder of language barrier physical differences and loss of your native land all help to problematize this already extremely convulsed endeavor. While it is difficult for an Asian person to assimilate into American culture, it is similarly difficult for an Asian American to assimilate back to their native country. The feeling of alienation does not disappear just because similar faces surround them. The idea of assimilation is explored in both Joy Kogawa's Obasan and The Wedding Banquet. The novel and movie portray how we carry within ourselves remnants of the past, as inherited through family tradition and culture. It appears that for those who leave their place of birth, a constant nostalgia without cure creates a new ideology that has little to do with their origin, and more to do with effective assimilation. In both pieces of literature we see exs of how assimilation conquers individuals as they familiarize themselves to the new Western culture. Each character adapts to the new western culture in a different way. Both, Obasan and The Wedding Banquet will portray how each character faces assimilation 
In both stories, the Asian upbringing plays a prominent role. In Obasan, Naomi and her brother raised fairly well, as they never had dubious problems about their Japanese heritage until the war began. Then when the war began, anti-Japanese sentiments began to rise, so began the probleming. While, in The Wedding Banquet we see that Chinese culture is characterized by strongly believing in familial loyalty, having a family, and having a son to keep the family name going. Western identity is about individualism. Each character in the novel complies with their heritage differently. 
There is Stephen, who after the teasing and tormenting in his adolescence of being a gimpy Jap, he felt embarrassed of who he was, and he tries to disunite himself from his culture. In college, he felt embarrassed by his aunt and uncle for being too accustomed to Japanese traditions. As Naomi states, when he was travelling with a French girl, he only stayed in the house for five minutes. When he reaches adulthood, he completely detaches himself from every root of Japanese culture, running away from his ethnicity. "Stephen has made himself altogether unfamiliar with speaking Japanese (Kogawa 253)." Aunt Emily's attitude towards Japanese culture is also very intense. She is stubborn of the fact that she is a Canadian and there is no difference between her and any native born Canadian. In Uncle and Obasan's case, they withdraw in a world of acceptance and silence and persistent isolation. They never seem to care about what it means to be Japanese- Canadian in Canada. They pursue their Japanese traditions and when met with prejudice, they neglect it. "She does not dance to the multicultural piper's tune or respond to the racist slur. She remains in a silent territory. (kogawa pg. 248)". Naomi must charter with the world around her, and she does this in a way that initiates a balance between Aunt Emily's attitudes of her Japanese ethnicity. Naomi is the only one who does not despise her heritage, does not withdraw within herself nor has thoughts that she should and will be accepted as a native born Canadian. Naomi still eats Japanese food, visits her Uncle and Obasan, understands her native language but she also recognizes the prejudice that surrounds them and though it might make her insolent, she still has managed to keep up a strong balance of cultures and often reflects over her identity. 
Wai- Tung compiles to western heritage differently than the other characters from Obasan. Wai-Tung's is successful in real estate and an American citizen, who has forgotten about his Chinese roots and has adapted to American heritage very well. The only thing that can foil him is the secret that he keeps from his parents. Simon portrays traditional female characteristics in the relationship. Simon can cook, wears earrings and is always nagging Wei-tung about spending too much time at work. Simon is a benevolent person and Wei-tung's parents like him but he cannot produce any children. As stated earlier family is extremely important in Chinese culture and so the fact that they can't produce kids as a result of them being gay it endangers Chinese culture. The father arrives in the U.S. so that Chinese values and traditions can continue. However, in order for the -father to make Chinese values and traditions last in the west he must come and give up some of his rights, values, and traditions. The last scene of the movie is symbolic of this act when the father throws his hands up as in surrender to the white western security guard. This act represents the surrendering of his Chinese identity in order to enter America and control the traditions the way he wants them to. Wai-Tung's is successful in real estate and an American citizen, who has forgotten about his Chinese roots and has assimilated to American culture very well. The only thing that can foil him is the secret that he keeps from his parents. 
Throughout the movie, we see an unbalanced Chinese family struggling between an opposite yet parallel cultures. They struggle to understand the concept of individualism and homosexuality because they want to preserve their son from assimilating to the western culture which leads to conflict in balancing both cultures. In the movie the Wedding Banquet, balancing cultures is prominent. This movie illustrates how even though the world is being westernized, the future for Chinese culture is looking threatened.
The book and the movie are quite similar because they demonstrate how balancing cultures can be conflicting. Some characters balance culture effectively like Naomi while others struggle fall into western ideologies such as homosexuality. All in all, both stories portray how Asian Americans integrate to the western culture. Finally, we see how each character assimilates to the new culture differently. Both, stories show how migrating to a new world can threaten your origin because you inherit a new culture and new ideas.