<p>Because he nearly died there, I suppose </p>

<p>That, or because he lost Iskandar there. </p>

<p>He likes some parts of Japan, especially the pop culture such as games and possibly anime/manga, but he just hates everything else in the culture. For example, a foreigner would like steak but dislike sushi or how maybe Waver would prefer pasta instead of Ramen. Same with other minor aspects such as the futon bed, when Waver would likely prefer an actual bed. </p>