2011 sure is a big year for Tokusatsu:

45 years of Ultraman,
40 years of Kamen Rider,
35 installments of Super Sentai, and
60 years in business for Toei, the creators of the later two franchises.

As for the Metal Hero Series (also created by Toei), next year will have been 30 years since Gavan debuted and 15 since B-Fighter Kabuto, the franchise's last universally recognized installment (not everyone counts Kabutack and Robotack, and I am not among those who do), went off the air.