Everyone has to cross the river

The River IQ game is a nice implementation of a fiendish logic puzzle. As the text is in Japanese, here are the rules:

1. Everyone has to cross the river
2. Only 2 people are allowed on the raft at any one time
3. Only the Mother, Father and Policeman know how to operate the raft
4. The Father can not stay with any of the Daughters without their Mother's presence (damn dysfunctional Japanese families)
5. The Mother can not stay with any of the Sons without their Father's presence
6. The Thief (striped shirt) can not stay with any family member if the Policeman is not there

Seems simple, I know, but you'll find it's more complex than appears at first.

Mechanics of the game:

• Click on the big blue circle bottom right to start the game
• Click on the people to move them on and off the raft
• Click on either red-topped pole to move the raft to the opposite side of the river

It is soluble, I promise! Let me know how many steps there are in your solution if you attempt it, please, as we're keen to see if there is a more efficient (or even just any other) solution than ours.