Calbee announced their first set for 2013 (along with its checklist) on their website this past week. I'm not sure about something with the set - either the "Star" cards are no longer considered an insert set or Calbee has cut back on the number of cards in the set.
The set features 72 "regular" player cards, six per team. There's also two definite subsets - the 24 card "Title Holder" subset featuring players who either led their league in one or more statistical categories or won one or more awards (or led in a stat AND won an award) and the four card checklist subset (featuring team mascots apparently). There's also the 24 card "Star" set which in previous years has been considered an insert set, not a subset of the base set. The banner on the website for the "Star" set is blue, however, when in previous years it was red, indicating that it was an insert set. If it is still not considered part of the base set then Calbee has shrunk the size of their base set by at least one subset over what's been typical the last few years.