MINI BULK CARRIERS will soon start operation in Far Eastern waters. Ten of these 215-foot, twin-screw motorships are being constructed in Japan for Ceres Hellenic Shipping Enterprises Ltd. of Piraeus, Greece, according to George P. Livanos, president of Seres Shipping Inc., the New York representative for Ceres. These ships will rendezvous with a large bulk carrier and take on or discharge 3,100 tons of cargo. The smaller ship will be capable of picking up or delivering dry bulk cargoes from inland areas of underdeveloped countries. Ceres has an option to build ten more ships of this type and can see the need for 100 such ships. The first ship will be delivered this month.