Japan DOES have biases against other countries.
Samsung (A korean company) is reviled in Japan, so they actually sell their phones there now under a different company.
http://techcrunch.com/2015/04/19/samsung-ditches-logos-in-japan/
That said, a huge amount of people have Apple iPhones, so American companies aren't a source of conflict.
It's really more about hating Korea and China than loving Japan.
iPhones are made in China, So are PS4's.
K-pop and Korean drams are highly popular in Japan, issues around overstaturation in Korea's own smaller music market have led to odd fixtures such as K pop group SHU-I lacking a korean website and having this sort of discography:
Korean discography
Mini-album
[2013.07.25] Mini Album Vol.1
Digital single
[2009.09.11] Bomb Bomb Bomb
Japanese discography
Album
[2012.07.15] Nextage
[2015.03.25] I-Dream
Mini-album
[2011.01.26] Star Light (indies)
Singles
[2011.05.04] Smile For Me
[2011.08.17] Summer Sweet / Kizuna (キズナ
[2011.12.07] Never Give Up Yeah! (ネバギバ Yeah!)
[2012.04.11] Don't Be Down
[2012.11.21] Daigyakuten (大逆転
[2013.03.13] Achakocha Sorry (あちゃこちゃSorry)
[2013.11.25] So In Luv
[2014.06.30] Kon'nani kimi o sukinanoni dōshite? (こんなに君を好きなのにどうして?)
[2014.12.15] Mirai e (未来へ
Because japanese hate baka gajin or something.
KARA
Korean albums
The First Blooming (2007)
Revolution (2009)
Step (2011)
Full Bloom (2013)
Japanese albums
Girl's Talk (2010)
Super Girl (2011)
Girls Forever (2012)
Fantastic Girls (2013)
Girl's Story (2015)
KARA was so hated for the deep sin of being non japanese they got a Tokyo dome Concert and their own Anime show....
The success of US and South Korean products, culture, and firms other than Samsung phones and Xbox indicate that there are issues around those products and not on the phantasms of inscrutable Japanese bigotry.