despite such efforts the survival rate for newborn dolphins is low. the aquarium has only one adult dolphin that was born there. >> translator: breeding dolphins costs a lot. it's expensive to equip breeding facilities and there are labor costs associated with acquiring the necessary skills. >> reporter: this aquarium says it's difficult to obtain dolphins other than through drive hunts and seceding from waza is an option if they wish to purchase live dolphins. some japanese think international criticism is unfair. groups of lawmakers of the governing liberal democratic party held a meeting to discuss this issue. >> translator: drive hunting is a part of a japanese tradition that's been practiced for a long time. we cannot approve the waza recommendation. it contradicts what we advocate. >> reporter: some diet members argued they should discuss ways to support aquariums if they withdraw from waza. japanese experts say it will be some time before breeding technology can be improved. they say they have to address this issue now so that people can continu