Uehara has many good or great season. He's pitched in MLB for 9 years and never had a WHIP above 1.163 after his rookie year (which was 1.245).
7 straight seasons under 0.957 and 5 straight under 0.917. He might have the lowest all time 3 year WHIP stretch:
2011: 0.723
2012: 0.639
2013: 0.565 with Boston
Okajima did well for us for several years.
What about ...
Hiroki Kuroda (awesome career from ages 33-39- never had an ERA above 3.76)
Hisashi Iwakuma (Pretty good for a guy starting in MLB at age 31)
Yu Darvish (Watch what he makes with his next contract)
Tmo Ohka (pretty good 4 year stretch)