Chiba Zoological Park

 

Thanks to Sandip Jayle-san for this information:

Chiba Zoological park is an hour journey from Ojima by car. Kids will like this Zoo and small amusement park for kids. Kids can enjoy Chibatoshi-Monorail outside of the park which pass through lush greenery.

 

Rest of all required details are available on this site (like entry fee/Parking fee/How to reach there, attractions, address with phone number, ). Fortunately, this site is in English :)

http://www.city.chiba.jp/somu/shichokoshitsu/kokusai/tour_zoo.html

 

Map:

http://www.tripadvisor.com/LocalMaps-g298158-d1314414-Chiba_Zoological_Park-Area.html