Across the Divide / Humiliation spurred student Yoko Mizui Daily Yomiuri Staff Writer It was a humiliating experience as a homestay visitor in Sydney when he was 20 that first made Yuichiro Sumiyoshi study English hard. Sumiyoshi, who runs Step English Institute in Fukuoka, couldn't speak a word of English when he first visited Australia on a three-month tourist visa. As Japanese friends who wer..