Here is a useful guide to find all of the Jizo statues in each level:
https://gamefaqs.gamespot.com/boards/956190-mini-ninjas/5130...Ninja Mountain (6 Jizo Statues)
Leaving Home (8 Jizo Statues)
Earth Castle (8 Jizo Statues)
Great River Canyon (6 Jizo Statues)
A Distress Signal (3 Jizo Statues)
Haunted Forest (5 Jizo Statues)
Night Castle (8 Jizo Statues)
Grassy Hills (8 Jizo Statues)
Flooded Valley (3 Jizo Statues)
Water Castle (6 Jizo Statues)
Winter Range (8 Jizo Statues)
Snow Castle (7 Jizo Statues)
Snowy Canyon (2 Jizo Statues)
Volcano's Shadow (6 Jizo Statues)
The Big Jump (3 Jizo Statues)
Final Approach (5 Jizo Statues)
Living Castle (8 Jizo Statues)